Koldo managing Andorra in 2016
|Full name||Jesús Luis Álvarez de Eulate Güergue|
|Date of birth||4 September 1970|
|Place of birth||Vitoria, Spain|
|Height||1.90 m (6 ft 3 in)|
|1990||→ Toledo (loan)||15||(0)|
* Senior club appearances and goals counted for the domestic league only|
Born in Vitoria-Gasteiz, Álava, Basque Country, Spain, Koldo played his entire career in the country. He signed in the 1990 summer transfer window with Atlético Madrid from local CD Aurrerá de Vitoria, but struggled to appear even for the reserves; due to injury to main squad first-choice Abel Resino, he was on the substitutes bench in the 1990–91 Copa del Rey final, against RCD Mallorca.
Koldo resumed his career in the lower leagues, being second or third-choice. In 1994, he signed with FC Andorra which competed in the Spanish football league system, going on to remain with the club for 14 of the following 15 seasons and retiring at nearly 39 years of age. After being naturalized, he began appearing with the Andorra national team, making his debut on 3 June 1998 in a 0–3 friendly loss to Brazil.
On 10 June 2009, Koldo played his last international, a 0–6 defeat against England for the 2010 FIFA World Cup qualifiers. Arguably one of the best players in the match, he received a standing ovation from the opposing fans for his efforts, after he was substituted in injury time; previously, in November 2003, to celebrate UEFA's Jubilee, he was selected as Andorra's Golden Player by the Andorran Football Federation as their most outstanding player of the past 50 years.
On 2 February 2010, Koldo was appointed as the Andorra national team's manager, replacing David Rodrigo. His first win (on his 49th game in charge) came seven years and 20 days later, 2–0 over fellow minnows San Marino in a friendly; on 25 March 2017, nearly 12 years after the last point won in official matches, he led the side to a 0–0 draw against Faroe Islands for the 2018 World Cup qualifying campaign. On 9 June, for the same competition, a 1–0 win over Hungary in Andorra la Vella was achieved, the first competitive one since October 2004.
- As of match played 3 June 2018
- "El Mallorca, finalista elemplar" [Mallorca, the perfect finalist]. Mundo Deportivo (in Spanish). 30 June 1991. Retrieved 13 March 2014.
- Griffiths, Frank (10 June 2009). "Andorra loses 6–0 to England but prevents ridicule". USA Today. Retrieved 8 November 2010.
- "Golden Players take centre stage". UEFA.com. 29 November 2003. Retrieved 13 March 2014.
- "Jubilee Awards". RSSSF. Retrieved 26 December 2011.
- "Koldo, nou seleccionador de futbol" [Koldo, new national team manager]. Diari d'Andorra (in Catalan). 2 February 2010. Retrieved 26 December 2011.
- "Andorra derrota a San Marino y consigue su primera victoria en 13 años" [Andorra defeat San Marino and get their first win in 13 years]. El País (in Spanish). 22 February 2017. Retrieved 28 September 2017.
- "Koldo Alvarez wins first Andorra match at 49th attempt". The Sack Race. 23 February 2017. Retrieved 28 September 2017.
- "Y 58 partidos después, Andorra no perdió" [And 58 matches later, Andorra did not lose]. El Mundo (in Spanish). 25 March 2017. Retrieved 28 September 2017.
- "Andorra players shed tears of joy after first competitive win since 2004". ESPN FC. 9 June 2017. Retrieved 28 September 2017.
- "Andorra stun Hungary to end 66-match winless run despite completing just 44 passes". The Daily Telegraph. 10 June 2017. Retrieved 28 September 2017.
- "Koldo". European Football. Retrieved 3 June 2013.
- "Koldo". Worldfootball. Retrieved 23 February 2017.