NEW YORK - 9. září 2021: 2021 US Open boys 'singles champion Daniel Rincon of Spain in action during his quarterfinal match at Billie Jean King National Tennis Center in New York - Stock fotografie a obrázky

NEW YORK - SEPTEMBER 9, 2021: 2021 US Open boys' singles champion Daniel Rincon of Spain in action during his quarterfinal match at Billie Jean King National Tennis Center in New York

NEW YORK - SEPTEMBER 9, 2021: 2021 US Open boys' singles champion Daniel Rincon of Spain in action during his quarterfinal match at Billie Jean King National Tennis Center in New York

NEW YORK - SEPTEMBER 9, 2021: 2021 US Open boys' singles champion Daniel Rincon of Spain in action during his quarterfinal match at Billie Jean King National Tennis Center in New York

NEW YORK - SEPTEMBER 9, 2021: 2021 US Open boys' singles champion Daniel Rincon of Spain in action during his quarterfinal match at Billie Jean King National Tennis Center in New York

NEW YORK -SEPTEMBER 5, 2016: Professional tennis player Kei Nishikori of Japan in action during his round four match at US Open 2016 at Billie Jean King National Tennis Center in New York

NEW YORK -SEPTEMBER 6, 2016: Grand Slam champion Mike Bryan in action during US Open 2016 quarterfinal doubles match at Billie Jean King National Tennis Center in New York

NEW YORK - AUGUST 31, 2017: Grand Slam champion Roger Federer of Switzerland in action during his US Open 2017 round 2 match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 31, 2017: Grand Slam champion Roger Federer of Switzerland in action during his US Open 2017 round 2 match at Billie Jean King National Tennis Center

NEW YORK- SEPTEMBER 3, 2016: Twelve times Grand Slam champion Novak Djokovic of Serbia practices for for US Open 2016 at Billie Jean King National Tennis Center in New York

NEW YORK - AUGUST 28, 2017: Professional tennis player Marin Cilic of Croatia in action during his 2017 US Open first round match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 11, 2021: 2021 US Open boys' singles champion Daniel Rincon of Spain in action during his final match at Billie Jean King National Tennis Center in New York

NEW YORK - SEPTEMBER 3, 2019: 20-time Grand Slam champion Roger Federer of Switzerland in action during the 2019 US Open quarter-final match against Grigor Dimitrov in New York

NEW YORK -SEPTEMBER 5, 2016: Professional tennis player Kei Nishikori of Japan in action during his round four match at US Open 2016 at Billie Jean King National Tennis Center in New York

NEW YORK - SEPTEMBER 1, 2018: Professional tennis player Alexander Zverev of Germany in action during his 2018 US Open round of 32 match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 27, 2019: Professional tennis player Stefanos Tsitsipas of Greece in action during his 2019 US Open first round match at Billie Jean King National Tennis Center in New York

NEW YORK - AUGUST 28, 2018: 20-time Grand Slam champion Roger Federer of Switzerland in action during the 2018 US Open first round match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 2, 2019: Professional tennis player Matteo Berrettini of Italy in action during the 2019 US Open round of 16 match against Andrey Rublev at Billie Jean King Tennis Center

NEW YORK - AUGUST 31, 2017: Grand Slam champion Roger Federer of Switzerland in action during his US Open 2017 round 2 match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 3, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open round of 16 match at Billie Jean King National Tennis Center

NEW YORK- SEPTEMBER 3, 2016: Twelve times Grand Slam champion Novak Djokovic of Serbia practices for for US Open 2016 at Billie Jean King National Tennis Center in New York

NEW YORK - AUGUST 25, 2015: Fourteen times Grand Slam Champion Rafael Nadal of Spain practices for US Open 2015 at Billie Jean King National Tennis Center in New York

NEW YORK - SEPTEMBER 1, 2019: 20-time Grand Slam champion Roger Federer of Switzerland in action during the 2019 US Open round of 16 match at National Tennis Center in New York

NEW YORK - AUGUST 22, 2017: Nineteen times Grand Slam Champion Roger Federer of Switzerland practices for US Open 2017 at Billie Jean King National Tennis Center in New York