Nieky Holzken

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Nieky Holzken
BornNicolaas Hubertus Holzken[1]
(1983-12-16) December 16, 1983 (age 38)
Helmond, Netherlands
Other namesThe Natural
Height6 ft 0 in (183 cm)
Weight170 lb (77 kg; 12 st 2 lb)
Reach74 in (188 cm)
Fighting out ofHelmond, Netherlands
TeamGolden Glory (2006–2013)[2]
Team Holzken Helmond
TrainerSjef Weber
Years active2001–present
Professional boxing record
By knockout11
Kickboxing record
By knockout47
By knockout5
No contests1
Other information
Boxing record from BoxRec
Last updated on: Juli 15, 2017

Nicolaas Hubertus Holzken (born December 16, 1983) is a Dutch super middleweight kickboxer and professional boxer currently signed to ONE Championship, where he competes in the Lightweight division. He is the former Glory Welterweight Champion. In 2015 Kickboxing Planet voted him the Kickboxer of the Year.[3] As of November 2021, Combat Press ranks him as the #5 welterweight kickboxer in the world.[4]

In 2018, Holzken participated in the World Boxing Super Series as a substitute.


After his parents separated when he was an infant, Nieky was raised up by his paternal grandparents.[5] Inspired by martial arts movies, he started training kickboxing at the age of ten.[2]



Nieky Holzken made his K-1 debut on November 26, 2006, at K-1 World MAX North European Qualification in Stockholm, Sweden. He won the tournament by three consecutive KO's over Björn Kjöllerström, Joakim Karlsson and Elias Daniel. The win qualified him for the K-1 World MAX 2007 Final Elimination, where he was matched up against the reigning K-1 MAX champion Buakaw Por. Pramuk. He lost the fight by unanimous decision.


He faced Murat Direkçi at Glory 2: Brussels on October 6, 2012, in Brussels, Belgium[6] and won via TKO due to a cut in the second round.[7]

He defeated Karim Ghajji via TKO due to a cut in an extension round at Glory 6: Istanbul in Istanbul, Turkey on April 6, 2013.[8][9][10]

He was to fight at SLAMM!! - Soema na Basi IV: Londt vs. Adegbuyi in Paramaribo, Suriname on August 8, 2013[11] but withdrew for undisclosed reasons.

He was initially scheduled to fight Marc de Bonte in the Glory 13: Tokyo - Welterweight World Championship Tournament semi-finals in Tokyo, Japan on December 21, 2013[12] but his opponent was then changed to Karapet Karapetyan who he had previously fought and beat in February 2012 by decision.[13] He knocked Karapetyan down in rounds one and two en route to a clear unanimous decision win before facing Joseph Valtellini in the final. In a back-and-forth fight where both pressed forward, landing powerful but technical punches and kicks, Holzken scored a TKO in the dying seconds of the third and final round to be crowned the inaugural Glory World Welterweight (-77.1 kg/170 lb) Tournament Champion.[14]

He was set to fight for the inaugural Glory Welterweight Championship against Marc de Bonte at Glory 14: Zagreb in Zagreb, Croatia on March 8, 2014[15] but the fight was cancelled when he suffered a shoulder injury in a car accident.[16] The match was rescheduled for Glory 16: Denver in Broomfield, Colorado, US on May 3, 2014[17] but his lingering shoulder injury again forced him out, and he was replaced by Karapet Karapetyan.[18]

On February 6, 2015, Holzken was part of a one-night, four-man welterweight tournament at Glory 19 to determine who would get the next title shot. In the semifinals, he faced Alexander Stetsurenko and won via unanimous decision. In the finals, he faced Raymond Daniels and won via TKO in the third round.

On April 16, 2016, he defeated Yoann Kongolo. After the match-up Holzken expressed his desire to in-ring commentator Joseph Valtellini that he wished to face him again.

On July 2, 2018, Holzken announced on his social media that he had rejected a contract offer from Glory and was entertaining offers from other promotions.[19]


Since 2013, Holzken had competed in professional boxing alongside his kickboxing career, but in February 2018 he got the biggest opportunity in the sport when he stepped in at late notice to face Callum Smith in the World Boxing Super Series super-middleweight tournament. The Dutchman was 13-0 coming in, and Smith 23-0.[20] Smith took the win by unanimous decision, and then went on to KO George Groves in the final.

ONE Championship[edit]

Holzken returned to kickboxing when he signed for ONE Championship, making his debut with a second round KO over Cosmo Alexandre at ONE Championship: Warrior's Dream in November 2018.[21]

He would challenge Regian Eersel for the inaugural ONE Lightweight Kickboxing World Championship at ONE Championship: Enter the Dragon in May 2019 and lose via unanimous decision.[22] The two would rematch for the title in October 2019 at ONE Championship: Dawn of Valor, but Holzken lost again via unanimous decision.[23]

It was announced that Nieky Holzken would face Elliot Compton at ONE Championship: Big Bang 2 on December 11, 2020. It was also revealed that Holzken had signed a six-fight contract extension with ONE after his original contract expired.[24][25] Holzken knocked Compton out in the first round, with a liver shot.[26]

Holzken faced John Wayne Parr in a Muay Thai bout at ONE on TNT 3 on April 21, 2021.[27] He won the bout via TKO after dropping Parr with a head kick in the second round.[28] A mere fortnight after the bout Holzken announced that his contract had expired and he became a free agent.[29]

On September 13, 2021, Holzken announced that he had signed a new multi-fight contract with ONE Championship.[30]

As the first fight of his new six-fight contract, Holzken was scheduled to face the one-time ONE Lightweight Kickboxing title challenger Islam Murtazaev at ONE X on March 26, 2022.[31][32] With the removal of all Russian athletes from the event as a result of the 2022 Russian invasion of Ukraine, Murtazaev was replaced by Sinsamut Klinmee and the fight was changed to Muay Thai rules.[33][34] He lost the fight by a second-round knockout.[35]

Holzken faced the one-time ONE welterweight title challenger Islam Murtazaev at ONE 162: Zhang vs. Di Bella on October 21, 2022.[36]

Personal life[edit]

Holzken's family and in-laws are Woonwagenbewoners, Indigenous Dutch Travellers (Gypsies).[37][38]

Holzken and his wife Nathellie have a son Geraldo and a daughter Willisha.[32]


Kickboxing record[edit]

Kickboxing record
94 Wins (58 (T)KO's), 17 Losses, 0 Draws, 1 No Contest
Date Result Opponent Event Location Method Round Time Record
2022-10-21 Russia Islam Murtazaev ONE 162: Zhang vs. Di Bella Kallang, Singapore
2022-03-26 Loss Thailand Sinsamut Klinmee ONE Championship: X Kallang, Singapore KO (Punch) 2 1:39 94-17-0
2021-04-21 Win Australia John Wayne Parr ONE on TNT 3 Kallang, Singapore TKO (head kick) 2 1:23 94-16-0
2020-12-11 Win Australia Elliot Compton ONE Championship: Big Bang 2 Kallang, Singapore KO (liver punch) 1 1:36 93-16-0
2019-10-26 Loss Suriname Regian Eersel ONE Championship: Dawn Of Valor Jakarta, Indonesia Decision (Unanimous) 5 3:00 92-16-0
For ONE Kickboxing Lightweight title
2019-05-17 Loss Suriname Regian Eersel ONE Championship 96: Enter the Dragon Kallang, Singapore Decision (Unanimous) 5 3:00 92-15-0
For ONE Kickboxing Lightweight title
2019-02-22 Win Morocco Mustapha Haida ONE Championship 90: Call to Greatness Kallang, Singapore Decision (Unanimous) 3 3:00 92-14-0
2018-11-17 Win Brazil Cosmo Alexandre ONE Championship 84: Warrior's Dream Jakarta, Indonesia KO (uppercut) 2 2:59 91-14-0
2017-12-09 Loss Azerbaijan Alim Nabiev Glory 49: Rotterdam Rotterdam, Netherlands Decision (Unanimous) 3 3:00 90-14-0
2017-06-10 Loss Cameroon Cédric Doumbé Glory 42: Paris Paris, France Decision (split) 5 3:00 90-13-0
For Glory Welterweight Championship
2016-12-10 Loss Cameroon Cédric Doumbé Glory: Collision Oberhausen, Germany Decision (split) 5 3:00 90-12-0
Lost Glory Welterweight Championship
2016-10-21 Win Netherlands Murthel Groenhart Glory 34: Denver Broomfield, Colorado Decision (unanimous) 5 3:00 90-11-0
Defends Glory Welterweight Championship.
2016-04-16 Win Switzerland Yoann Kongolo Glory 29: Copenhagen Copenhagen, Denmark Decision (unanimous) 5 3:00 88-11-0
Defends Glory Welterweight Championship.
2015-12-04 Win Netherlands Murthel Groenhart Glory 26: Amsterdam Amsterdam, Netherlands Decision (split) 5 3:00 87-11-0
Defends Glory Welterweight Championship.
2015-08-07 Win United States Raymond Daniels Glory 23: Las Vegas Las Vegas, Nevada, USA TKO (right knee cut) 3 1:36 86-11-0
Wins vacant Glory Welterweight Championship.
2015-02-06 Win United States Raymond Daniels Glory 19: Virginia Hampton, Virginia, USA TKO (4 Knockdowns) 3 1:25 85-11-0
Wins Glory Welterweight Contender Tournament Final.
2015-02-06 Win Russia Alexander Stetsurenko Glory 19: Virginia Hampton, Virginia, USA Decision (unanimous) 3 3:00 84-11-0
Wins Glory Welterweight Contender Tournament Semi Finals
2014-12-25 Win Turkey Yusuf Karakaya One Shot World Series Antalya, Turkey TKO (Referee Stoppage) 1 2:05 83-11-0
2013-12-21 Win Canada Joseph Valtellini Glory 13: Tokyo Tokyo, Japan TKO (right hook) 3 3:00 82-11-0
Wins Glory Welterweight World Championship Tournament Final
2013-12-21 Win Armenia Karapet Karapetyan Glory 13: Tokyo Tokyo, Japan Decision (unanimous) 3 3:00 81-11-0
Wins Glory Welterweight Contender Tournament Semi Finals
2013-04-06 Win Morocco Karim Ghajji Glory 6: Istanbul Istanbul, Turkey TKO (cut) 4 80-11-0
2012-10-06 Win Turkey Murat Direkçi Glory 2: Brussels Brussels, Belgium TKO (cut) 2 79-11-0
2012-09-02 Loss Morocco L'houcine Ouzgni Muay Thai Mania V The Hague, Netherlands Extra R. Decision 4 3:00 78-11-0
2012-05-26 Win Sweden Alex Tobiasson Harris Glory 1: Stockholm Stockholm, Sweden TKO (3 knockdowns/liver shots) 2 2:42 78-10-0
2012-03-23 Win Georgia (country) Davit Kiria United Glory 15: World Series 2012 Moscow, Russia Decision 3 3:00 77-10-0
2012-02-12 Win Armenia Karapet Karapetyan Natural Powers Eindhoven, Netherlands Decision 5 3:00 76-10-0
Defends WFCA K-1 Rules World Super Middleweight (-76.20 kg) title
2011-12-23 Win United States Cyrus Washington Klaar Om Te Bossen 3 Paramaribo, Suriname TKO (Cut) 2
2011-11-06 Win United States Ky Hollenbeck Muay Thai Premier League: Round 3 The Hague, Netherlands Decision (Unanimous) 3 3:00
2011-09-02 Win Suriname Marco Piqué Muaythai Premier League: Round 1 Long Beach, California, USA Decision 3 3:00
2011-05-28 Loss Ukraine Artur Kyshenko United Glory 14: 2010-2011 World Series Finals Moscow, Russia Decision (Unanimous) 3 3:00
2011-03-19 Win France Carlos Tavares United Glory 13: 2010-2011 World Series Semifinals Charleroi, Belgium KO (Punches) 1 2:04
2011-02-27 Win Germany Thilo Schneider Kickboxgala Golden Glory Helmond, Sporthal Haagdijk Eindhoven, Netherlands TKO (Corner stoppage) 2 3:00
Wins the WFCA K-1 Rules World Super Middleweight (-76.20 kg) title
2010-10-16 Win Suriname Murthel Groenhart United Glory 12: 2010-2011 World Series Quarterfinals Amsterdam, Netherlands Ext. R Decision 4 3:00
2010-09-12 Loss Morocco L'houcine Ouzgni Fightingstars presents: It's Showtime 2010 Amsterdam, Netherlands KO (Left flying knee) 1 0:53
2010-06-19 Win Germany Cagri Ermis A1 World Combat Cup Eindhoven, Netherlands Decision 3 3:00
2010-05-29 Win Brazil Cosmo Alexandre It's Showtime 2010 Amsterdam Amsterdam, Netherlands Decision (4-1) 3 3:00
2010-04-10 Win Belgium Mourad Salhi Star Muaythai V Maastricht, Netherlands Ext R. Decision 4 3:00
2010-01-30 Win Netherlands Leroy Kaestner Beast of the East Zutphen, Netherlands Decision (Unanimous) 3 3:00
2009-12-06 Win Morocco Mohammed Medhar GGH Gala Helmond, Netherlands Decision (Unanimous) 3 3:00
2009-10-17 Win Morocco Faldir Chahbari Ultimate Glory 11: A Decade of Fights Amsterdam, Netherlands Extr R. Decision (Unanimous) 4 3:00
2009-07-13 Loss Thailand Buakaw Por.Pramuk K-1 World MAX 2009 Final 8 Tokyo, Japan Decision (Unanimous) 3 3:00
2009-04-21 Win Morocco Chahid Oulad El Hadj K-1 World MAX 2009 Final 16 Fukuoka, Japan Decision (Majority) 3 3:00
2008-11-30 Win Suriname Marco Pique SLAMM "Nederland vs Thailand V" Almere, Netherlands KO (Left hook) 3 2:56
2008-10-01 Win South Africa Virgil Kalakoda K-1 World MAX 2008 Final Tokyo, Japan KO (Right hook) 1 1:42
2008-07-06 Win Netherlands William Diender Ultimate Glory 9 Nijmegen, Netherlands KO (Left body shot) 4 0:47
2008-05-31 Win Portugal José Reis Beast of the East 2008 Zutphen, Netherlands Decision (Unanimous) 5 3:00
2008-04-26 Win Netherlands Joerie Mes K-1 World GP 2008 in Amsterdam Amsterdam, Netherlands KO (Spinning back kick) 2 2:21
2008-03-15 Win Morocco Karim El Jouharti It's Showtime 75MAX Trophy 2008, Super Fight 's-Hertogenbosch, Netherlands Decision (Unanimous) 3 3:00
2008-01-26 Loss Cape Verde Alviar Lima Beast of the East Zutphen, Netherlands KO (Left hook) 3 0:36
For WFCA World Thaiboxing Middleweight (-72.57 kg) title
2007-11-24 Loss Netherlands Andy Souwer Shootboxing in the Autotron Rosmalen, Netherlands Decision (Unanimous) 3 3:00
2007-10-27 Win Thailand Lamsongkram Chuwattana SLAMM "One Night in Bangkok" Antwerp, Belgium Decision (Unanimous) 3 3:00
2007-09-09 Win Syria Baker Barakat Ultimate Glory 5 Amersfoort, Netherlands Decision (Unanimous) 3 3:00
2007-06-28 Loss Thailand Buakaw Por. Pramuk K-1 World MAX 2007 Final Elimination Tokyo, Japan Decision (Unanimous) 3 3:00
2007-05-13 Win Belgium Marijn Geuens Fight Night in Veghel Veghel, Netherlands KO (Spinning back kick)
2007-04-07 Win Belarus Ruslan Kaladko Balans Fight Night Tilburg, Netherlands Decision (Unanimous) 3 3:00
2007-01-21 Win Germany Steve Neumann Ultimate Glory 2 Amersfoort, Netherlands KO (Left uppercut) 1
2006-11-24 Win Sweden Elias Daniel K-1 World MAX North European Qualification 2007 Stockholm, Sweden KO (Left body shot) 3 0:50
Wins K-1 World MAX North European Qualification 2007 tournament title
2006-11-24 Win Sweden Joakim Karlsson K-1 World MAX North European Qualification 2007 Stockholm, Sweden KO (Straight right punch) 1 0:34
2006-11-24 Win Sweden Björn Kjöllerström K-1 World MAX North European Qualification 2007 Stockholm, Sweden KO (Right hook) 1 2:20
2006-09-23 Win Belgium Jan van Denderen It's Showtime 75MAX Trophy Final 2006, Reserve Fight Rotterdam, Netherlands Decision (Unanimous) 3 3:00
2006-03-26 Win Suriname Terence Oosterling West Point Fight II Tilburg, Netherlands KO (Left cross) 1 0:10
2006-03-05 Win Netherlands Travers Schlee Future Battle Bergen op Zoom, Netherlands TKO
2005-12-17 Win Turkey Ferhat Atasoy WFCA Gala "The Eye of the Tiger" Arnhem, Netherlands KO
2005-10-30 Loss Netherlands Donald Berner It's Showtime 75MAX Trophy Alkmaar, Pool B Semi Finals Alkmaar, Netherlands Ext R. Decision (Unanimous) 4 3:00
2005-09-25 Win England Daniel Hudson Manchester, England KO (Straight right punch) 1 1:01
Wins SIMTA Muaythai European title
2005-06-18 Win Netherlands Melvin van Leeuwaarde Showdome IV Amsterdam, Netherlands KO
2005-04-30 Win Turkey Ömer Tekin Queens Fight Night Eindhoven, Netherlands TKO (Corner stoppage) 1
2005-02-27 Win England Richard Jones Master Sken's Fight Night Manchester, England KO (Straight right punch) 2 1:06
2004-12-12 Win Turkey Servet Cakir Face to Face 2nd Edition, Final Apeldoorn, Netherlands Decision (Unanimous) 5 2:00
Wins M.O.N Dutch Open Amateur tournament (-71kg) title
2004-12-12 Win Turkey Felat Atasoy Face to Face 2nd Edition, Semi Final Apeldoorn, Netherlands Decision (Unanimous) 4 2:00
2004-12-12 Win France Radju Ramdjilal Face to Face 2nd Edition, Quarter Final Apeldoorn, Netherlands KO
2004-09-04 Loss Denmark Henrik Nygaard Valhalla 2004 Battle of the Vikings Aarhus, Denmark KO 4
2004-03-27 Win United States Steven Berkolayko WPKL Muay Thai Champions League XIII Rotterdam, Netherlands Decision (Unanimous) 5 2:00
2004-02-21 NC Turkey Mesut Acikyol Test of Talent Reloaded III Mortsel, Belgium No contest 5
2004-02-20 Win England Richard Jones Master Sken's Fight Night Manchester, England TKO 4
2004-02-01 Win Belgium Nico Lombaerts Thai-Kickboxing Gala Valkenswaard, Netherlands KO (Low kicks) 1
2003-12-19 Win Morocco Ali Moftagari Gala in Kampen Kampen, Netherlands KO
2003-06-29 Loss Netherlands Frank Sonders Dutch Muay Thai Championships Rotterdam, Netherlands Decision (Unanimous) 5 2:00
2002-11-17 Loss Netherlands Wesley Robijn Jellema promotion, Sporthal "De Wetering" Houten, Netherlands KO
2002-10-06 Win Netherlands Dennis Rooy WFCA Gala in Nijmegen Nijmegen, Netherlands Decision (Unanimous) 2 2:00
2002-04-13 Win Iran Reza Rahimpour TB Den Haag promotion, Fairtex Thaiboksgala The Hague, Netherlands TKO 2
Legend:   Win   Loss   Draw/No contest   Notes

Professional boxing record[edit]

15 fights 14 wins 1 loss
By knockout 11 0
By decision 3 1
No. Result Record Opponent Type Round Date Location Notes
15 Win 14–1 Germany Bernard Donfack TKO 3 (8) 28 Apr 2018 Germany Baden-Arena, Offenburg, Baden-Württemberg, Germany
14 Loss 13–1 United Kingdom Callum Smith UD 12 24 Feb 2018 Germany Arena Nürnberger Versicherung, Nuremberg, Germany For WBC (Diamond) super middleweight title
World Boxing Super Series: super-middleweight semi-final
13 Win 13–0 Ukraine Viktor Polyakov TKO 2 (10) 3 Feb 2018 Netherlands Sportschool Golden Glory, Helmond, Netherlands
12 Win 12–0 Germany Cagri Ermis KO 3 (10) 1 Apr 2017 Netherlands Sportschool Golden Glory, Helmond, Netherlands
11 Win 11–0 Belgium Matingu Kindele UD 10 9 Jul 2016 Netherlands Sportschool Golden Glory, Helmond, Netherlands Retained BeNeLux super middleweight title.
10 Win 10–0 Netherlands Farouk Daku UD 10 20 Feb 2016 Netherlands Sportschool Golden Glory, Helmond, Netherlands Won vacant BeNeLux super middleweight title.
9 Win 9–0 Turkey Yesilat Berkta KO 2 (6) 11 Nov 2015 Germany Update Disco, Meppen, Germany
8 Win 8–0 Belgium Ahmed El Ghoulbzouri PTS 6 6 Jun 2015 Netherlands Sporthal Genderbeemd, Eindhoven, Netherlands
7 Win 7–0 Georgia (country) Mikheil Khutsishvili KO 3 (8) 19 Apr 2015 Netherlands Sportschool Golden Glory, Helmond, Netherlands
6 Win 6–0 Ukraine Ruslan Shchelev KO 6 (8) 12 Oct 2014 Netherlands Sportschool Golden Glory, Helmond, Netherlands
5 Win 5–0 Germany Ismael Altintas TKO 2 (6) 13 Jul 2014 Netherlands Sportschool Golden Glory, Helmond, Netherlands
4 Win 4–0 Georgia (country) Gary Abajyan TKO 3 (6) 14 Oct 2013 Netherlands Theater Carré, Amsterdam, Netherlands
3 Win 3–0 Germany Philipp Kolodziej TKO 2 (6) 21 Sep 2013 Netherlands Sportschool Golden Glory, Helmond, Netherlands
2 Win 2–0 Turkey Ata Dogan TKO 1 (4) 6 Jul 2013 Netherlands Sportschool Golden Glory, Helmond, Netherlands
1 Win 1–0 Germany Anatolij Baron KO 2 (4) 3 Mar 2013 Netherlands Sportschool Golden Glory, Helmond, Netherlands

See also[edit]


  1. ^ Glory 23 results Nevada Athletic Commission (August 7, 2015)
  2. ^ a b Jarrod Boyle (May 16, 2016). "Verhoeven and Holzken: the New Generation of Dutch Dominance".
  3. ^ DiPietro, Monty. "Zimmerman is the Man at K-1 Europe GP". K-1 Grand Prix Website. Retrieved 2008-05-24.
  4. ^ Aittama, Zach. "Combat Press Kickboxing Rankings: November 2021". Retrieved 1 December 2021.
  5. ^ "How Martial Arts Made Nieky Holzken A Better Person". ONE Championship. November 8, 2018.
  6. ^ Rian Scalia. "GLORY 2 Brussels Final Fight Card For This Saturday". Archived from the original on 2014-01-16. Retrieved 2012-10-04.
  7. ^ Rian Scalia. "GLORY 2 Brussels Live Results".
  8. ^ Rian Scalia. "GLORY 6 Poster/Fighters Expected to Participate".
  9. ^ Rian Scalia. "Updated GLORY 6 Istanbul Fight Card For Saturday, April 6".
  10. ^ Rian Scalia. "GLORY 6 Istanbul: Daniel Ghita vs. Gokhan Saki, Live Results".
  11. ^ "SLAMM!! – Soema na Basi IV: Ismael Londt vs. Benjamin Adegbuyi | FSA - FightSport Asia". Archived from the original on August 18, 2013. Retrieved July 18, 2013.
  12. ^ "Match ups announced for Glory 13 welterweight tournament in Japan ~ Muay Thai Authority". Archived from the original on October 22, 2013. Retrieved December 9, 2013.
  13. ^ "Raymond Daniels replaces Marc de Bonte in Glory 13 welterweight tournament ~ Muay Thai Authority". Archived from the original on December 2, 2013. Retrieved December 9, 2013.
  14. ^ Dave Walsh. "GLORY SuperFight Series Tokyo and GLORY 13 Spoilers".
  15. ^ Dave Walsh. "GLORY Makes GLORY 14 in Zagreb Official".
  16. ^ Roy. "GLORY 14 Zagreb: Fight Card". Kickboxingplanet.
  17. ^ Dave Walsh. "Nieky Holzken vs. Marc De Bonte Set for GLORY 16 Denver".
  18. ^ Dave Walsh. "Nieky Holzken Forced Out of GLORY 16 Title Fight".
  19. ^ "Holzken rejects new GLORY Contract". July 2, 2018.
  20. ^ Davies, Gareth A. (2018-02-24). "Callum Smith defeats Nieky Holzken to set up George Groves World Boxing Series final". The Telegraph. ISSN 0307-1235. Retrieved 2019-02-15.
  21. ^ "Nieky Holzken Dazzles With A Crushing KO In His ONE Debut | ONE Championship". 2018-11-17. Retrieved 2019-02-15.
  22. ^ "ONE Championship: Enter the Dragon Results". 17 May 2019.
  23. ^ "ONE Championship 2019: Dawn of Valor Results and Highlights". Bleacher Report.
  24. ^ "Nieky Holzken booked to face Elliot Compton according to reports in Holland". Asian MMA. 2020-10-19. Retrieved 2020-10-19.
  25. ^ "Nieuw contract en comeback in november voor Nieky Holzken bij ONE Championship: 'Ik blijf dé uitdager'". Retrieved 19 October 2020.
  26. ^ "Holzken zorgt met knock-out voor spectaculaire rentree in Singapore". Retrieved 11 December 2020.
  27. ^ "John Wayne Parr faces Nieky Holzken at ONE on TNT Part III". Asian MMA. 2021-02-27. Retrieved 2021-03-01.
  28. ^ "One Championship 'One on TNT 3' Play-by-Play & Results". Sherdog. Retrieved 2021-04-22.
  29. ^ Nieky Holzken [@niekyholzken] (May 6, 2021). "My contract has ended successfully at @onechampionship. What's next for me?" (Tweet) – via Twitter.
  30. ^ Nieky Holzken [@niekyholzken] (September 13, 2021). "It's official... I am proud to say that I have signed another multi-deal with @onechampionship. This is the best contract of my career so far and I am very happy with it" – via Instagram.
  31. ^ Robinson, Lucky (28 January 2022). "ONE Championship books Nieky Holzken-Islam Murtazaev kickboxing fight for ONE X super-card". Retrieved 29 January 2022.
  32. ^ a b Dan Kuhl (March 24, 2022). "ONE X's Nieky Holzken: Back in the Saddle".
  33. ^ "Nieky Holzken faces Sinsamut Klinmee at ONE: 'X'". Asian MMA. 2022-03-22. Retrieved 2022-03-26.
  34. ^ "ONE Championship announces Sinsamut Klinmee as Nieky Holzken's opponent at ONE X". Sportskeeda. 2022-03-22. Retrieved 2022-03-26.
  35. ^ Willemse, Jan (26 March 2022). "Nieky Holzken verliest eerste gevecht van 2022: Thaise vechter slaat Helmonder knock-out". Retrieved 26 March 2022.
  36. ^ Pico, Borna (2 October 2022). "Sitthichai takes on undefeated Mohammed Boutasaa, Dutch legend Nieky Holzken vs. Murtazev set for Oct. 21". Retrieved 2 October 2022.
  37. ^ AMPD MAGAZINE (17 Feb 2016). "Exclusive interview with Nieky Holzken World Welterweight Champion Kickboxer". YouTube. Retrieved 8 March 2021.
  38. ^ "Woonwagenbewoner krijgt eigen realityprogramma op Spike". 23 Sep 2019. Retrieved 8 March 2021.
  39. ^ Fraser Coffeen (9 January 2014). "Kickboxing 2013 Year End Awards: Fighter, Fight, and KO of the Year". Bloody Elbow.
  40. ^ Dave Walsh. "LiverKick Best of 2013: Fight of the Year".

External links[edit]