| Cho Yoon-jeong | |
| Residence: | Seoul, Korea |
| Birth Date: | 1979 4, df=y |
| Birth Place: | Andong, Korea |
| Height: | 1.67 m |
| Turnedpro: | 1996 |
| Retired: | 2008 |
| Plays: | Right-handed (two-handed backhand) |
| Careerprizemoney: | $603,590 |
| Singlestitles: | 5 ITF |
| Highestsinglesranking: | No. 45 (14 July 2003) |
| Australianopenresult: | 2R (2003) |
| Frenchopenresult: | 1R (2002, 2003, 2005) |
| Wimbledonresult: | 2R (2003, 2005) |
| Usopenresult: | 3R (2002, 2005) |
| Doublestitles: | 1 WTA, 10 ITF |
| Highestdoublesranking: | No. 98 (22 September 2003) |
| Australianopendoublesresult: | 1R (1999, 2006) |
| Frenchopendoublesresult: | 1R (2005) |
| Wimbledondoublesresult: | 1R (1998, 2004) |
| Usopendoublesresult: | 2R (2003) |
Cho Yoon-jeong (ko|조윤정, born 2 April 1979) is a South Korean former tennis player.
In her career, she won one doubles title on the WTA Tour, at Seoul in 2004. Her best Grand Slam performance came when she made the third round of the 2005 US Open by defeating Arantxa Parra Santonja in three sets in the first round, upsetting the 27th seed Gisela Dulko in the second round, before she fell to No. 7, Justine Henin. She reached career-high WTA rankings of No. 45 in singles (in July 2003), and No. 98 in doubles (in September 2003).
Yoon-jeong retired from professional tennis in 2008.
| Legend | |
|---|---|
| Tier I (0–0) | |
| Tier II (0–0) | |
| Tier III (0–0) | |
| Tier IV & V (0–3) |
| Result | Date | Tournament | Surface | Opponent | Score | |
|---|---|---|---|---|---|---|
| Loss | Nov 2002 | Pattaya Open, Thailand | Hard | Angelique Widjaja | 2–6, 4–6 | |
| Loss | Jan 2003 | Auckland Open, New Zealand | Hard | Eleni Daniilidou | 4–6, 6–4, 6–7(2–7) | |
| Loss | Jan 2006 | Canberra International, Australia | Hard |  Anabel Medina Garrigues | 4–6, 6–0, 4–6 |
| Result | Date | Tournament | Surface | Partner | Opponents | Score | |
|---|---|---|---|---|---|---|---|
| Loss | Jul 2003 | Stanford Classic, United States | Hard |  Francesca Schiavone | Cara Black  Lisa Raymond | 6–7(5–7), 1–6 | |
| Win | Oct 2004 | Seoul Open, South Korea | Hard |  Jeon Mi-ra | Chuang Chia-jung Hsieh Su-wei | 6–3, 1–6, 7–5 |
| Legend | |
|---|---|
| $100,000 tournaments | |
| $75,000 tournaments | |
| $50,000 tournaments | |
| $25,000 tournaments | |
| $10,000 tournaments |
| Outcome | No. | Date | Tournament | Surface | Opponent | Score | |
|---|---|---|---|---|---|---|---|
| Runner-up | 1. | 31 March 1996 | ITF Jakarta, Indonesia | Hard | Choi Young-ja | 2–6, 1–6 | |
| Winner | 2. | 6 April 1997 | ITF Jakarta | Hard | Choi Young-ja | 6–4, 6–1 | |
| Runner-up | 3. | 13 April 1997 | ITF Jakarta | Hard | Choi Young-ja | 1–6, 5–7 | |
| Winner | 4. | 18 February 2001 | ITF Midland, United States | Hard | Tara Snyder | 6–3, 6–1 | |
| Runner-up | 5. | 18 February 2001 | ITF Seoul, South Korea | Hard | Miho Saeki | 3–6, 0–6 | |
| Runner-up | 6. | 25 November 2001 | ITF Nuriootpa, Australia | Hard |  Saori Obata | 4–6, 1–6 | |
| Winner | 7. | 21 July 2002 | ITF Oyster Bay, United States | Hard |  Irina Selyutina | 7–6(5), 6–4 | |
| Winner | 8. | 24 November 2002 | ITF Nuriootpa | Hard |  Alicia Molik | 6–4, 6–1 | |
| Runner-up | 9. | 8 June 2003 | ITF Surbiton, United Kingdom | Grass | Kristina Brandi | 1–6, 3–6 | |
| Runner-up | 10. | 21 November 2004 | ITF Nuriootpa | Hard | Evie Dominikovic | 4–6, 7–5, 4–6 | |
| Runner-up | 11. | 28 November 2004 | ITF Mount Gambier, Australia | Hard | Evie Dominikovic | 5–7, 3–6 | |
| Runner-up | 12. | 13 February 2005 | ITF Midland | Hard | Laura Granville | 3–6, 6–3, 6–7(6) | |
| Winner | 13. | 20 March 2005 | ITF Orange, United States | Hard | Julia Schruff | 7–6(3), 6–1 |
| Outcome | No. | Date | Tournament | Surface | Partner | Opponents | Score | |
|---|---|---|---|---|---|---|---|---|
| Runner-up | 1. | ITF Jakarta, Indonesia | Hard | Won Kyung-joo |  Jasmine Choudhury Lizzie Jelfs | 4–6, 6–7 | ||
| Winner | 2. | 5 May 1997 | ITF Seoul | Clay | Kim Eun-ha | Choi Young-ja Park Sung-hee | 6–3, 7–6(6) | |
| Runner-up | 3. | 3 May 1998 | ITF Gifu, Japan | Grass | Park Sung-hee | Catherine Barclay Kerry-Anne Guse | 6–7(3), 4–6 | |
| Winner | 4. | 10 May 1998 | ITF Seoul | Clay | Park Sung-hee |  Ding Ding Li Ting | 6–1, 3–6, 6–2 | |
| Winner | 5. | 21 March 1999 | ITF Noda, Japan | Hard | Park Sung-hee | Shinobu Asagoe Yuka Yoshida | 6–3, 6–3 | |
| Winner | 6. | 2 May 1999 | ITF Gifu | Carpet | Chae Kyung-yee | Shiho Hisamatsu Nana Miyagi | 6–2, 4–6, 6–2 | |
| Runner-up | 7. | 24 May 1999 | ITF Warsaw, Poland | Clay | Park Sung-hee |  Magda Mihalache Jelena Kostanić Tošić | 1–6, 3–6 | |
| Winner | 8. | 31 January 2000 | ITF Clearwater, United States | Hard | Yi Jing-Qian | Sandra Cacic Lindsay Lee-Waters | 6–4, 7–6(7) | |
| Winner | 9. | 28 May 2000 | ITF Ho Chi Minh City, Vietnam | Hard | Saori Obata | Li Na Li Ting | 6–1, 6–2 | |
| Runner-up | 10. | 28 October 2000 | ITF Seoul | Hard | Jeon Mi-ra | Surina De Beer Marlene Weingärtner | 2–4, 1–4, 4–1 | |
| Winner | 11. | 1 May 2002 | ITF Gifu | Grass | Evie Dominikovic | Shinobu Asagoe Rika Fujiwara | 6–2, 6–2 | |
| Winner | 12. | 12 May 2002 | ITF Fukuoka, Japan | Hard | Shinobu Asagoe | Julie Pullin Lorna Woodroffe | 6–2, 6–4 | |
| Winner | 13. | 2 May 2004 | ITF Gifu | Carpet | Jeon Mi-ra | Chuang Chia-jung Wynne Prakusya | 7–6(4), 6–2 | |
| Winner | 14. | 15 November 2004 | ITF Nuriootpa | Hard | Evie Dominikovic Daniella Jeflea | 7–5, 6–2 | ||
| Runner-up | 15. | 4 May 2008 | ITF Gimcheon, South Korea | Hard | Kim Jin-hee | Chan Chin-wei Jarmila Gajdošová | 2–6, 0–6 | |
| Runner-up | 16. | 11 May 2008 | ITF Changwon, South Korea | Hard | Kim Jin-hee | Chang Kyung-mi Lee Jin-a | 5–7, 2–6 |