NEW YORK elokuu 23, 2018: Grand Slam mestari Serena Williams puhuu valmentajansa Patrick Mouratoglou harjoituksissa 2018 US Open Billie Jean King National Tennis Center - Kuvapankin valokuva ja kuva

NEW YORK - AUGUST 23, 2018: Grand Slam champion Serena Williams talks with her coach Patrick Mouratoglou during practice at the 2018 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 23, 2018: Grand Slam champion Serena Williams talks with her coach Patrick Mouratoglou during practice at the 2018 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 23, 2018: Grand Slam champion Serena Williams talks with her coach Patrick Mouratoglou during practice at the 2018 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 20, 2019: Grand Slam champion Serena Williams with her coach Patrick Mouratoglou during practice at the 2019 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 22, 2018: Grand Slam champion Serena Williams talks with her coach Patrick Mouratoglou during practice at the 2018 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 22, 2018: Grand Slam champion Serena Williams talks with her coach Patrick Mouratoglou during practice at the 2018 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 20, 2019: Grand Slam champion Serena Williams with her coach Patrick Mouratoglou during practice at the 2019 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 23, 2018: Grand Slam champion Serena Williams practices for the 2018 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 23, 2018: 23-time Grand Slam champion Serena Williams participates at Arthur Ashe Kids Day before 2018 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 23: Sixteen times Grand Slam champion Serena Williams practices for US Open 2014 with her coach Patrick Mouratoglou at National Tennis Center on August 23, 2014 in New York

NEW YORK - AUGUST 20, 2019: Grand Slam champion Serena Williams with her coach Patrick Mouratoglou during practice at the 2019 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 20, 2019: Grand Slam champion Serena Williams with her coach Patrick Mouratoglou during practice at the 2019 US Open at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 2: Grand Slam champions Serena Williams and Venus Williams during quarterfinal doubles match at US Open 2014 at National Tennis Center on September 2, 2014 in New York

NEW YORK - AUGUST 21: Grand Slam Champion Andy Murray practices with his coach Amelie Mauresmo for US Open 2014 at Billie Jean King National Tennis Center on August 21, 2014 in New York

NEW YORK - AUGUST 23, 2018: Grand Slam champion Serena Williams practices for the 2018 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 29, 2017: Professional tennis player Naomi Osaka of Japan celebrates victory after her US Open 2017 first round match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 20, 2019: Grand Slam champion Serena Williams with her coach Patrick Mouratoglou during practice at the 2019 US Open at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2015: Twenty one times Grand Slam champion Serena Williams in action during her round four match at US Open 2015 at National Tennis Center in New York

NEW YORK - AUGUST 23, 2018: Grand Slam champion Serena Williams practices for the 2018 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 31, 2019: Professional tennis player Taylor Townsend of United States in action during her 2019 US Open third round match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2018: 23-time Grand Slam champion Serena Williams in action during her 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 2, 2018: 23-time Grand Slam champion Serena Williams in action during her 2018 US Open round of 16 match at Billie Jean King National Tennis Center

NEW YORK- SEPTEMBER 1: Grand Slam champion Serena Williams celebrates victory after fourth round match at US Open 2013 against Sloane Stephens at Billie Jean King National Tennis Center on September 1, 2013 in New York

NEW YORK - AUGUST 23, 2018: 23-time Grand Slam champion Serena Williams participates at Arthur Ashe Kids Day before 2018 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 30, 2016: Grand Slam champion Serena Williams in action during her first round match at US Open 2016 at Billie Jean King National Tennis Center in New York

NEW YORK - AUGUST 23, 2018: 23-time Grand Slam champion Serena Williams participates at Arthur Ashe Kids Day before 2018 US Open at Billie Jean King National Tennis Center