Jeļena Ostapenko (born 8 June 1997), also known as Aļona Ostapenko, is a professional tennis player from Latvia. On 19 March 2018, she reached her best singles WTA rankings of world No. 5, and she peaked at world No. 32 in the WTA doubles rankings on 19 June 2017.
Ostapenko won the 2017 French Open singles title, becoming the first player from Latvia to win a Grand Slam tournament and the first unseeded player to win the French Open since 1933. In addition to her singles career, she has played as a member of Latvia's Fed Cup team. She has won seven singles and eight doubles titles on the ITF Women's Circuit, and she also won the junior singles event at the 2014 Wimbledon Championships. Ostapenko is known for her highly aggressive playing style, including powerful inside-out groundstrokes and a tendency to aim for the lines.
Ostapenko was born in Riga to former footballer Jevgēnijs Ostapenko and Jeļena Jakovļeva. Jevgēnijs played professional football for FC Metalurh Zaporizhya in the Ukrainian city of Zaporizhia where Jeļena's grandmother lives. Jeļena has one half-brother, Maksim, who lives in the United States. She was introduced to tennis at age 5 by her mother and idolized Serena Williams while growing up. She also started dancing around that age, going on to compete in the National Latvian Championships for Ballroom Dancing. At age 12, she chose to focus on tennis and credits her good coordination and skilled footwork to her years of dancing. She speaks Latvian, Russian, and English.