NEW YORK AUGUST 31, 2019: Ammattimainen tennispelaaja 15-vuotias Coco Gauff Yhdysvalloissa toiminnassa hänen 2019 US Open kolmannen kierroksen ottelun Billie Jean King National Tennis Center - Kuvapankin valokuva ja kuva

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 - AUGUST 27, 2018: 23-time Grand Slam champion Serena Williams in action during her 2018 US Open first round match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 1, 2019: Grand Slam champion Serena Williams in action during her 2019 US Open round of 16 match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 27, 2019: Professional tennis player 15-year-old Coco Gauff of United States in action during her 2019 US Open first round match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 31, 2019: Professional tennis player 15-year-old Coco Gauff of United States in action during her 2019 US Open third round match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 31, 2019: Professional tennis player 15-year-old Coco Gauff 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 - AUGUST 31, 2019: Professional tennis player 15-year-old Coco Gauff of United States in action during her 2019 US Open third round match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 31, 2019: Professional tennis player 15-year-old Coco Gauff 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 5, 2016: Grand Slam champion Serena Williams of United States in action during her round four match at US Open 2016 at Billie Jean King National Tennis Center in New York

NEW YORK - SEPTEMBER 1, 2019: Grand Slam champion Serena Williams in action during her 2019 US Open round of 16 match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 26, 2019: Grand Slam champion Serena Williams of United States in action during 2019 US Open semi-final match against Elina Svitolina at Billie Jean King National Tennis Center

NEW YORK - AUGUST 27, 2018: 23-time Grand Slam champion Serena Williams in action during her 2018 US Open first round match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 26, 2019: Grand Slam champion Serena Williams in action during 2019 US Open first round match against Maria Sharapova 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 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 - AUGUST 31, 2019: Professional tennis player 15-year-old Coco Gauff of United States in action during her 2019 US Open third round match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 1, 2019: Grand Slam champion Serena Williams in action during her 2019 US Open round of 16 match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 5, 2016: Grand Slam champion Serena Williams of United States in action during her round four match at US Open 2016 at Billie Jean King National Tennis Center in New York

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 3, 2016: Grand Slam champion Serena Williams of United States in action during her round three match at US Open 2016 at Billie Jean King National Tennis Center in New York

NEW YORK - SEPTEMBER 7, 2017: Grand Slam champion Venus Williams of United States in action during her semifinal match at 2017 US Open at Billie Jean King National Tennis Center in New York

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 8, 2018: 23-time Grand Slam champion Serena Williams in action during her 2018 US Open final match against Naomi Osaka at Billie Jean King National Tennis Center

NEW YORK - AUGUST 27, 2019: Professional tennis player 15-year-old Coco Gauff of United States in action during her 2019 US Open first round 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 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 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