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PARIS, FRANCE - MAY 25: US's Serena Williams (L) and US's Venus Williams (R) celebrate after a point during their women's double first round match against Jelena Ostapenko of Latvia and Yulia Putintseva of Kazakhstan at the French Open tennis tournament at Roland Garros in Paris, France on May 25, 2016. (Photo by Mustafa Yalcin/Anadolu Agency/Getty Images)

PARIS, FRANCE - MAY 25: US's Serena Williams (L) and US's Venus Williams (R) celebrate after a point during their women's double first round match against Jelena Ostapenko of Latvia and Yulia Putintseva of Kazakhstan at the French Open tennis tournament at Roland Garros in Paris, France on May 25, 2016. (Photo by Mustafa Yalcin/Anadolu Agency/Getty Images)