Kateryna Kozlova

Kateryna Ihorivna Kozlova (; born 20 February 1994) is a Ukrainian tennis player. On 19 February 2018, she achieved her career-high singles ranking of world No. 62. On 22 October 2012, she peaked at No. 139 in the doubles rankings. To date, Kozlova has won one doubles title on the WTA Challenger Tour as well as five singles and 13 doubles titles on the ITF Circuit.
Career.
On 27 May 2015, the International Tennis Federation announced that Kozlova has been found to have committed an anti-doping rule violation. She was found positive to a doping substance after taking a stimulant, dimethylbutylamine. Kozlova's suspension was reduced to six months since 15 February to 15 August 2015.
At the 2018 French Open, Kozlova became the second player to defeat a defending champion in the first round of Roland Garros, after a straight sets victory over 2017 champion Jeļena Ostapenko.
Performance timeline.
"Only main-draw results in WTA Tour, Grand Slam tournaments, Fed Cup/Billie Jean King Cup and Olympic Games are included in win/loss records."
Singles.
"This table is current through the 2021 Madrid Open."