New York - 22. srpna 2018: 13čas Grand Slamu Novak Djokovič ze Srbska postupy pro 2018 Us Open na Billie Jean King National Tennis - Stock fotografie a obrázky

NEW YORK - AUGUST 22, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia practices for the 2018 US Open at Billie Jean King National Tennis

NEW YORK - AUGUST 22, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia practices for the 2018 US Open at Billie Jean King National Tennis

NEW YORK - AUGUST 22, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia practices for the 2018 US Open at Billie Jean King National Tennis

NEW YORK - AUGUST 22, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia practices for the 2018 US Open at Billie Jean King National Tennis

NEW YORK - AUGUST 22, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia practices for the 2018 US Open at Billie Jean King National Tennis

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 - AUGUST 22, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia practices for the 2018 US Open at Billie Jean King National Tennis

NEW YORK - AUGUST 25, 2015:Two times Grand Slam Champion Lleyton Hewitt of Australia practices for US Open 2015 at Billie Jean King National Tennis Center in New York

FLUSHING, NY - AUGUST 21: Professional tennis player Milos Raonic practices for US Open at Billie Jean King National Tennis Center on August 21, 2012 in Flushing, NY

NEW YORK - AUGUST 22, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia practices for the 2018 US Open at Billie Jean King National Tennis

NEW YORK - AUGUST 22, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia practices for the 2018 US Open at Billie Jean King National Tennis

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 - 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 2, 2018: Professional tennis player Dominic Thiem of Austria in action during his 2018 US Open round of 16 match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 22, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia practices for the 2018 US Open at Billie Jean King National Tennis

NEW YORK - AUGUST 24: Professional tennis player Janko Tipsarevic practices for US Open 2013 at Billie Jean King National Tennis Center on August 24, 2013 in New York

NEW YORK - SEPTEMBER 2, 2018: Professional tennis player John Isner of United States in action during his round of 16 match at 2018 US Open at Billie Jean King National Tennis Center in New York

NEW YORK - AUGUST 22, 2018: Grand Slam Champion Stanislas Wawrinka of Switzerland practices for 2018 US Open at Billie Jean King National Tennis Center

Twelve times Grand Slam champion Rafael Nadal practices for US Open 2013 at Arthur Ashe Stadium

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 - AUGUST 27, 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 9, 2017: Top seeded junior player Axel Geller of Argentina in action during US Open 2017 junior boys' singles semifinal match at Billie Jean King National Tennis Center in New York

NEW YORK - AUGUST 20, 2019: 18-time Grand Slam champion Rafael Nadal of Spain practices for the 2019 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 22, 2019: 20-time Grand Slam champion Roger Federer of Switzerland practices for the 2019 US Open at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 5, 2016: Professional tennis player Ivo Karlovic of Croatia in action during US Open 2016 round four match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 10, 2017: Grand Slam champion Martina Navratilova during Women's Champions Doubles match at US Open 2017 at National Tennis Center in New York

NEW YORK - AUGUST 24: Six times Grand Slam champion Novak Djokovic practices for US Open 2014 at Billie Jean King National Tennis Center on August 24 , 2014 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 22, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia practices for the 2018 US Open at Billie Jean King National Tennis

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