Elena Sergeyevna Vesnina (born 1 August 1986) is a Russian former professional tennis player who was world No. 1 in doubles. Vesnina is a four-time Grand Slam champion, having won the 2013 French Open, 2014 US Open, and 2017 Wimbledon Championships in women's doubles with compatriot Ekaterina Makarova, and the 2016 Australian Open in mixed doubles, partnering Bruno Soares. She reached also eight further finals in women's doubles, and four in mixed doubles. She became world No. 1 for the first time in June 2018, alongside Makarova, with the pair jointly holding the top ranking for the next five weeks. Vesnina won 19 doubles titles on WTA Tour, including the 2016 WTA Finals and eight at WTA 1000-level. She also achieved significant success in singles, reaching her career-high ranking of world No. 13 in March 2017. Vesnina won three WTA singles titles, including the 2017 Indian Wells Open, and achieved her best Grand Slam result at the 2016 Wimbledon Championships, reaching the semifinals. She has represented Russia in the Billie Jean King Cup since 2006, winning the competition in 2007 and 2008, and competed at the Olympic Games on four occasions. Makarova and Vesnina won the gold medal at the 2016 Rio Olympics, and Vesnina also won mixed-doubles silver with Aslan Karatsev at the 2020 Tokyo Olympics.