Career
Her best Grand Slam performance was when she made the third round of the 2005 United States. Open, by defeating Arantxa Parra Santonja in three sets in the first round, upsetting the 27th seed Gisela Dulko in the second round, and fell, 6–0, 6–7(4) to number 7 Justine Henin-Hardenne. She reached career-high rankings of Number. 45 in singes (in July 2003), and Number.
98 in doubles (in September 2003).
Cho Yoon-jeong retired from tennis 2008.