New York - 6 September 2018: Professionele tennisspeelster Naomi Osaka in actie tijdens haar 2018 Us Open halve finale wedstrijd op Billie Jean King National Tennis Center - Stockfoto’s en -afbeeldingen

NEW YORK - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka celebrates victory after 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka celebrates victory after 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 31, 2015: Twenty one times Grand Slam champion Serena Williams in action during first round match at US Open 2015 at National Tennis Center in New York

NEW YORK - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka in action during her 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka celebrates victory after 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka in action during her 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka in action during her 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka in action during her 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka celebrates victory after 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka in action during her 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka in action during her 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka in action during her 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka in action during her 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 3, 2017: Grand Slam champion Venus Williams of United States in action during her round 4 match at 2017 US Open at Billie Jean King National Tennis Center in New York

NEW YORK - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka in action during her 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 29, 2017: Professional tennis player Madison Keys of United States in action during her US Open 2017 first round match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 3, 2017: Grand Slam champion Venus Williams of United States in action during her round 4 match at 2017 US Open at Billie Jean King National Tennis Center in New York

NEW YORK - AUGUST 22, 2018: 23-time Grand Slam champion Serena Williams practices for the 2018 US Open at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 3, 2017: Grand Slam champion Venus Williams of United States in action during her round 4 match at 2017 US Open at Billie Jean King National Tennis Center in New York

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 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: Professional tennis player Naomi Osaka in action during her 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka in action during her 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka 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 - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka in action during her 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2018: Professional tennis player Naomi Osaka in action during her 2018 US Open semi-final match at Billie Jean King National Tennis Center