Nowy Jork - 29 sierpnia 2017: Grand Slam Championem Roger Federer Szwajcarii w akcji podczas jego nas otwarte 2017 pierwszej rundzie meczu Billie Jean King National Tennis Center - Zdjęcie stockowe & obraz

NEW YORK - AUGUST 29, 2017: Grand Slam champion Roger Federer of Switzerland in action during his US Open 2017 first round match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2017: Grand Slam champion Roger Federer of Switzerland during his US Open 2017 quarterfinal match against Juan Martin Del Potro at Arthur Ashe Stadium

NEW YORK - SEPTEMBER 6, 2017: Grand Slam champion Roger Federer of Switzerland during his US Open 2017 quarterfinal match against Juan Martin Del Potro at Arthur Ashe Stadium

NEW YORK - AUGUST 31, 2017: Grand Slam champion Rafael Nadal of Spain in action during his US Open 2017 second round match at Billie Jean King National Tennis Center

NEW YORK - September 4, 2014: Seventeen times Grand Slam champion Roger Federer during quarterfinal match at US Open 2014 against Gael Monfils at Arthur Ashe Stadium 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 - SEPTEMBER 3, 2018: 20-time Grand Slam champion Roger Federer of Switzerland in action during the 2018 US Open round of 16 match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 6, 2017: Grand Slam champion Roger Federer of Switzerland in action during his US Open 2017 round 4 match at Billie Jean King National Tennis Center

NEW YORK -SEPTEMBER 2 Seventeen times Grand Slam champion Roger Federer during fourth round match at US Open 2013 against Tommy Robredo at Billie Jean King National Tennis Center on September 2, 2013 in New York

NEW YORK - SEPTEMBER 4, 2017: Grand Slam champion Roger Federer of Switzerland in action during his US Open 2017 round 4 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 - 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 29, 2017: Grand Slam champion Roger Federer of Switzerland in action during his US Open 2017 first round match at Billie Jean King National Tennis Center

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

NEW YORK - SEPTEMBER 3, 2018: 20-time Grand Slam champion Roger Federer of Switzerland in action during the 2018 US Open round of 16 match at Billie Jean King National Tennis Center

NEW YORK- AUGUST 31 Seventeen times Grand Slam champion Roger Federer during third round match at US Open 2013 against Adrian Mannarino at Billie Jean King National Tennis Center on August 31, 2013 in New York

NEW YORK - SEPTEMBER 6, 2017: Grand Slam champion Roger Federer of Switzerland during his US Open 2017 quarterfinal match against Juan Martin Del Potro at Arthur Ashe Stadium

FLUSHING, NY - AUGUST 27 Seventeen times Grand Slam champion Roger Federer during his first round match at US Open 2013 against Grega Zemlja at Billie Jean King National Tennis Center on August 27, 2013 in Flushing, NY

NEW YORK - AUGUST 26 Seventeen times Grand Slam champion Roger Federer during first round match at US Open 2014 against Marinko Matosevic at Arthur Ashe Stadium on August 26, 2014 in New York

NEW YORK- SEPTEMBER 7: Twelve times Grand Slam champion Rafael Nadal during semifinal match at US Open 2013 against Richard Gasquet at Arthur Ashe Stadium on September 7, 2013 in New York

FLUSHING, NY - AUGUST 27: Seventeen times Grand Slam champion Roger Federer during his first round match at US Open 2013 against Grega Zemlja at Billie Jean King National Tennis Center on August 27, 2013 in Flushing, NY

NEW YORK - SEPTEMBER 1, 2018: 20-time Grand Slam champion Roger Federer of Switzerland in action during the 2018 US Open round of 32 match at Billie Jean King National Tennis Center in New York

NEW YORK - AUGUST 23, 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

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

FLUSHING, NY - AUGUST 27: Seventeen times Grand Slam champion Roger Federer during his first round match at US Open 2013 against Grega Zemlja at Billie Jean King National Tennis Center on August 27, 2013 in Flushing, NY

NEW YORK - September 4, 2014: Seventeen times Grand Slam champion Roger Federer during quarterfinal match at US Open 2014 against Gael Monfils at Arthur Ashe Stadium 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