|Born||17 April 1980|
Seoul, South Korea
|Height||176 cm (5 ft 9 in)|
|Weight||67 kg (148 lb)|
|Highest ranking||1 (21 February 2004)|
|Current ranking||61 (10 September 2019)|
|Revised Romanization||I Hyeon-il|
2002 Asian Games
Lee competed in the 2002 Asian Games where he showed signs of promise as an ace singles player for Team Korea. In the men's team event, Lee dominated the opponents he faced in the tourney, completing all three matches less than 30 minutes and allowing only seven points in the semifinals and eight in the final. Team Korea eventually won their first men's team gold medal since 1986 when Park Joo-bong and Kim Moon-soo led the team.
|2002 Asian Games – Men's Team|
|October 6||Quarterfinal||Win||15–11, 15–7||Hidetaka Yamada|
|October 7||Semifinal||Win||15–5, 15–2||Lee Tsuen Seng|
|October 9||Final||Win||15–3, 15–5||Rony Agustinus|
2003 Sudirman Cup
At the 2003 Sudirman Cup held in Eindhoven, Netherlands, Lee helped his team to win its third Sudirman Cup title, winning all three singles matches. Though many great doubles players from South Korea had won numerous international competitions, Team Korea had always struggled to win the Thomas and Sudirman Cup competitions due to the lack of top men's singles players. However, Lee, the winner of the 2003 Swiss Open, showed spectacular performances through the Sudirman Cup tournament, not dropping a single set. In the semifinal, Lee defeated 2001 World Championship runner-up and 2001 All England Open semifinalist Peter Gade 2-0, which led his team to a 3-2 victory over Denmark. Lee won another 2-0 upset victory over world number one ranked Chen Hong in Game 1 of the South Korea's final team event against China.
|2003 Sudirman Cup|
|March 18||Group 1A||Win||15–5, 15–5||Rasmus Wengberg|
|March 22||Semifinal||Win||15–9, 15–12||Peter Gade|
|March 23||Final||Win||15–10, 15–12||Chen Hong|
Lee competed in the 2004 Summer Olympics, which was his first Olympic appearance. Lee easily defeated Stuart Brehaut of Australia in the first round. However, he was surprisingly eliminated in the second round by Boonsak Ponsana of Thailand.
At the 2006 IBF World Championships held in Madrid, Spain, Lee captured his first world championship medal in the men's singles event. He defeated Chetan Anand, Jan Fröhlich, Eric Pang and Chen Jin before losing to Bao Chunlai of China in the semifinals.
|2006 World Championships – Men's Singles|
|September 18||First Rd||Win||21-18, 18-21, 21-10||Chetan Anand|
|September 19||Second Rd||Win||21-10, 21-4||Jan Fröhlich|
|September 20||Third Rd||Win||21-16, 21-6||Eric Pang|
|September 21||Quarterfinal||Win||21-14, 19-21, 21-12||Chen Jin|
|September 22||Semifinal||Loss||15–21, 19-21||Bao Chunlai|
In 2008, he defeated top rank players Lin Dan and Lee Chong Wei in the Korea Open. He participated in the Beijing Olympics, where he reached the semi-finals before being defeated by world number one, Lee Chong Wei from Malaysia, and then being beaten by Chen Jin of China in the bronze-medal playoff.
Retirement and comeback
After the 2008 Olympics, Lee announced his retirement from international badminton and only competed in national competitions. However, in April 2010 he came out of retirement after much persuasion from the coach and teammates to fill the void of singles players in the Korean national squad. In May 2010, Lee participated in the 2010 Thomas Cup and played in two singles matches.
2012 Summer Olympics
|2006||Palacio de Deportes de la Comunidad de Madrid,
|Bao Chunlai||15–21, 19–21||Bronze|
|2006||Aspire Hall 3, Doha, Qatar||Lin Dan||3–21, 10–21||Bronze|
|2002||Gangseo Gymnasium, Busan, South Korea||Taufik Hidayat||7–15, 9–15||Silver|
|2005||Gachibowli Indoor Stadium, Hyderabad, India||Kuan Beng Hong||11–15, 4–15||Bronze|
Asian Junior Championships
|1998||Kuala Lumpur Badminton Stadium,
Kuala Lumpur, Malaysia
|Endra Feryanto||8–15, 5–15||Bronze|
BWF World Tour (1 title)
The BWF World Tour, announced on 19 March 2017 and implemented in 2018, is a series of elite badminton tournaments, sanctioned by Badminton World Federation (BWF). The BWF World Tour are divided into six levels, namely World Tour Finals, Super 1000, Super 750, Super 500, Super 300 (part of the HSBC World Tour), and the BWF Tour Super 100.
|2018||Macau Open||Super 300||Zhou Zeqi||21–9, 21–19||Winner|
BWF Superseries (1 title, 3 runners-up)
The BWF Superseries had two level such as Superseries and Superseries Premier. A season of Superseries featured twelve tournaments around the world, which introduced since 2011, with successful players invited to the Superseries Finals held at the year end.
|2017||Denmark Open||Srikanth Kidambi||10–21, 5–21||Runner-up|
|2016||French Open||Shi Yuqi||16–21, 19–21||Runner-up|
|2008||Korea Open||Lin Dan||4–21, 23–21, 25–23||Winner|
|2008||Malaysia Open||Lee Chong Wei||15–21, 21–11, 17–21||Runner-up|
BWF Grand Prix (18 titles, 11 runners-up)
The BWF Grand Prix has two level such as Grand Prix and Grand Prix Gold. It is a series of badminton tournaments, sanctioned by Badminton World Federation (BWF) since 2007. The World Badminton Grand Prix sanctioned by International Badminton Federation (IBF) since 1983.
|2017||Malaysia Masters||Ng Ka Long||21–14, 15–21, 9–10 (retired)||Runner-up|
|2016||U.S. Open||Kanta Tsuneyama||24–22, 21–8||Winner|
|2016||Canada Open||B. Sai Praneeth||12–21, 10–21||Runner-up|
|2016||Thailand Masters||Hu Yun||21–18, 21–19||Winner|
|2015||U.S. Grand Prix||Rajiv Ouseph||21–19, 21–12||Winner|
|2015||Korea Masters||Lee Dong-keun||21–17, 14–21, 14–21||Runner-up|
|2015||Thailand Open||Ihsan Maulana Mustofa||21–17, 22–24, 21–8||Winner|
|2015||Vietnam Open||Tommy Sugiarto||19–21, 19–21||Runner-up|
|2015||New Zealand Open||Qiao Bin||21–12, 21–14||Winner|
|2015||Malaysia Masters||Jeon Hyeok-jin||19–21, 21–13, 21–15||Winner|
|2014||Korea Masters||Lee Dong-keun||18–21, 22–24||Runner-up|
|2014||Canada Open||Ng Ka Long||21–16, 21–14||Winner|
|2013||Korea Masters||Hong Ji-hoon||21–18, 21–12||Winner|
|2012||Swiss Open||Chen Jin||21–14, 9–21, 17–21||Runner-up|
|2011||Korea Masters||Shon Wan-ho||21–18, 21–16||Winner|
|2011||Macau Open||Du Pengyu||17–21, 21–11, 21–18||Winner|
|2011||Thailand Open||Chen Long||8–21, 19–21||Runner-up|
|2011||Swiss Open||Park Sung-hwan||21–17, 9–21, 17–21||Runner-up|
|2010||Macau Open||Lee Chong Wei||No match||Runner-up|
|2008||German Open||Sho Sasaki||22–20, 21–5||Winner|
|2006||All England Open||Lin Dan||7–15, 7–15||Runner-up|
|2005||Chinese Taipei Open||Shon Seung-mo||15–13, 15–5||Winner|
|2005||Indonesia Open||Boonsak Ponsana||15–10, 15–3||Winner|
|2003||German Open||Lin Dan||15–4, 15–4||Winner|
|2003||Dutch Open||Muhammad Hafiz Hashim||5–15, 15–8, 15–6||Winner|
|2003||Swiss Open||Anders Boesen||15–10, 15–2||Winner|
|2002||Japan Open||Xia Xuanze||5–7, 7–5, 0–7, 7–5, 7–2||Winner|
|2001||U.S. Open||Kenneth Jonassen||6–8, 7–2, 7–2, 7–5||Winner|
|2001||Japan Open||Muhammad Roslin Hashim||11–15, 6–15||Runner-up|
BWF International Challenge/Series (5 titles, 3 runners-up)
|2019||South Australia International||Ng Tze Yong||21–23, 1–5r||Runner-up|
|2015||Thailand International||Suppanyu Avihingsanon||21–13, 21–10||Winner|
|2014||Malaysia International||Tan Chun Seang||17–21, 21–16, 21–11||Winner|
|2014||Indonesia International||Jonatan Christie||11–10, 9–11, 5–11, 11–8, 11–3||Winner|
|2014||Sri Lanka International||Anand Pawar||17–21, 21–10, 21–15||Winner|
|2005||Thailand Satellite||Shon Seung-mo||5–15, 3–15||Runner-up|
|2000||Waitakere International||Rio Suryana||15–8, 15–0||Winner|
|2000||Swedish Open||Rasmus Wengberg||12–15, 11–15||Runner-up|
- "Lee Hyun Il first to become men's singles World #1". Badmintontimes. 21 February 2004. Retrieved 30 March 2017.
- "한국 남자단식의 에이스 이현일" (in Korean). 배드민턴데일리. Retrieved 17 June 2017.
- "한국 배드민턴, 이현일도 8강 진출 좌절" (in Korean). OhmyNews. Retrieved 17 June 2017.
- "Lee Hyun-Il Stuns Bao in Beijing". Badminton Information. Retrieved 17 June 2017.
- "China's Lin Dan wins badminton men's singles final". People's Daily. Retrieved 17 June 2017.
- "China's Chen Long wins badminton singles bronze". Retrieved 5 August 2012.
- "BWF Launches New Events Structure". Badminton World Federation. 29 November 2017.
- "Action-Packed Season Ahead!". Badminton World Federation. 15 January 2018.
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