Yoon Yong-Il (born September 23, 1973, in Daegu, South Korea) is a former professional South Korean tennis player.

Yoon Yong-Il
Country (sports) South Korea
ResidenceSeoul, South Korea
Born (1973-09-23) 23 September 1973 (age 51)
Daegu, South Korea
Height1.75 m (5 ft 9 in)
Turned pro1996
PlaysRight-handed
Prize moneyUS$190,990
Singles
Career record20–20
Career titles0
Highest rankingNo. 140 (December 18, 2000)
Grand Slam singles results
Australian OpenQ3 (1994, 1996, 1997)
French OpenQ2 (2001)
Wimbledon1R (2001)
US Open1R (1998)
Doubles
Career record6–12
Career titles0
Highest rankingNo. 188 (May 14, 2001)
Yoon Yong-il
Medal record
Tennis
Representing  South Korea
Asian Games
Gold medal – first place 1998 Bangkok Men's Singles
Gold medal – first place 1998 Bangkok Team Event
Silver medal – second place 1998 Bangkok Men's Doubles
Silver medal – second place 2002 Busan Team Event
Summer Universiade
Gold medal – first place 1995 Fukuoka Men's Singles
Gold medal – first place 1997 Catania Men's Singles
Gold medal – first place 1997 Catania Men's Doubles

Yoon reached his highest individual ranking on the ATP Tour on December 18, 2000, when he became World number 140. He played primarily on the Futures circuit and the Challenger circuit.

Yoon was a member of the South Korean Davis Cup team, posting a 16–10 record in singles and a 3–4 record in doubles in sixteen ties played.

Tour singles titles – all levels (7–10)

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Legend (singles)
Grand Slam (0–0)
Tennis Masters Cup (0–0)
ATP Masters Series (0–0)
ATP Tour (0–0)
Challengers (1–2)
Futures (6–8)
Outcome No. Date Tournament Surface Opponent in the final Score
Winner 1. September 23, 1996   Beijing, China Hard   Xia Jiaping 6–4, 2–6, 6–1
Winner 2. May 4, 1998   Beijing, China Hard   Hideki Kaneko 6–3, 7–5
Runner-up 1. May 11, 1998   Tianjin, China Hard   Hideki Kaneko 4–6, 7–6, 0–6
Runner-up 2. October 5, 1998   Maishima, Japan Carpet   Lee Hyung-Taik 6–7, 6–2, 4–6
Winner 3. July 5, 1999   Jakarta, Indonesia Clay   Rik De Voest 7–6, 7–5
Runner-up 3. July 26, 1999   St. Joseph, U.S. Hard   Thomas Dupré 6–4, 4–6, 1–6
Winner 4. August 9, 1999   Kansas City, U.S. Hard   David Nalbandian 6–3, 6–7, 6–2
Winner 5. February 28, 2000   Jakarta, Indonesia Hard   Kwon Oh-hee 6–2, 6–4
Runner-up 4. May 8, 2000   Fukuoka, Japan Grass   Takahiro Terachi 6–2, 6–7, 1–6
Winner 6. May 15, 2000   Osaka, Japan Hard   Paul Baccanello 6–4, 6–7, 6–4
Runner-up 5. May 22, 2000   Seoul, South Korea Clay   Park Seung-kyu 5–7, 6–7
Runner-up 6. July 24, 2000   Winnetka, U.S. Hard   Takao Suzuki 2–6, 4–6
Runner-up 7. August 7, 2000   Binghamton, U.S. Hard   Takao Suzuki 1–6, 4–6
Runner-up 8. November 27, 2000   Manila, Philippines Hard   Zbynek Mlynarik 6–4, 0–6, 2–6
Runner-up 9. December 4, 2000   Manila, Philippines Hard   Danai Udomchoke 3–6, 6–3, 5–7
Winner 7. April 21, 2003   Kumamoto, Japan Hard   Benjamin Kohllöffel 6–3, 6–2
Runner-up 10. December 12, 2003   Seogwipo, South Korea Clay   Takahiro Terachi 0–6, 5–7
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