Jeļena "Aļona" Ostapenko (born 8 June 1997) is a Latvian professional tennis player. She has a career-high singles ranking of world No. 5 in singles by the WTA, achieved in March 2018, and No. 3 in doubles, attained in July 2025. Ostapenko has won nine WTA Tour–level singles titles, including a major at the 2017 French Open, and 13 doubles titles, including two majors at the 2024 US Open in women's doubles with Lyudmyla Kichenok and at the 2026 Wimbledon Championships in mixed doubles with Marcelo Arévalo. She is the current No. 1 player from Latvia.
Ostapenko has also won 15 singles titles and 15 doubles titles on the ITF Women's Circuit, and the junior singles event at the 2014 Wimbledon Championships. She is a member of the Latvia Billie Jean King Cup team.
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