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 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

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 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 21: Six times Grand Slam champion Novak Djokovic practices for US Open 2014 at Billie Jean King National Tennis Center on August 21, 2014 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 - 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, 2019: 20-time Grand Slam champion Roger Federer of Switzerland practices for the 2019 US Open at Billie Jean King National Tennis Center

FLUSHING, NY - AUGUST 24: Professional tennis player Ricardas Berankis practices for US Open 2013 at Billie Jean King National Tennis Center on August 24, 2013 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

FLUSHING, NY - AUGUST 24: Professional tennis player Ricardas Berankis practices for US Open 2013 at Billie Jean King National Tennis Center on August 24, 2013 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

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 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 - AUGUST 26, 2017: Professional tennis player Tomas Berdych of Czech Republic in practice for 2017 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 20, 2019: Five times Grand Slam Champion Maria Sharapova of Russia practices for 2019 US Open at Billie Jean King National Tennis Center in New York

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

FLUSHING, NY - AUGUST 25: Grand Slam champion Andy Roddick practices for US Open at Louis Armstrong Stadium at Billie Jean King National Tennis Center on August 25, 2012 in Flushing, NY.