NEW YORK - 1 ΣΕΠΤΕΜΒΡΙΟΥ 2019: 20 φορές πρωταθλητής Grand Slam Roger Federer της Ελβετίας σε δράση κατά τη διάρκεια του US Open γύρου του 16 αγώνα στο National Tennis Center στη Νέα Υόρκη - Φωτογραφίες & Εικόνες Αρχείου

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 - 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 - 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 - 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 - 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 - 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, 2018: 20-time Grand Slam champion Roger Federer of Switzerland practices for the 2018 US Open at Billie Jean King National Tennis Center

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 - 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 -SEPTEMBER 5, 2015: Seventeen times Grand Slam champion Roger Federer of Switzerland in action during his third round match at US Open 2015 at National Tennis Center in NY5

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 - AUGUST 22, 2018: 20-time Grand Slam champion Roger Federer of Switzerland practices for the 2018 US Open at Billie Jean King National Tennis Center

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

MIAMI GARDENS, FLORIDA - MARCH 27, 2019: Grand Slam champion Roger Federer of Switzerland in action during his round of 16 match at 2019 Miami Open at the Hard Rock Stadium in Miami Gardens, Florida

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 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 - 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 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

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

MIAMI GARDENS, FLORIDA - MARCH 27, 2019: Grand Slam champion Roger Federer of Switzerland in action during his round of 16 match at 2019 Miami Open at the Hard Rock Stadium in Miami Gardens, Florida

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 21: Seventeen times Grand Slam champion Roger Federer practices for US Open 2014 at Billie Jean King National Tennis Center on August 21 , 2014 in New York

MIAMI GARDENS, FLORIDA - MARCH 27, 2019: Grand Slam champion Roger Federer of Switzerland in action during his round of 16 match at 2019 Miami Open at the Hard Rock Stadium in Miami Gardens, Florida

MIAMI GARDENS, FLORIDA - MARCH 27, 2019: Grand Slam champion Roger Federer of Switzerland in action during his round of 16 match at 2019 Miami Open at the Hard Rock Stadium in Miami Gardens, Florida

NEW YORK - AUGUST 31, 2017: Professional tennis player Grigor Dimitrov of Bulgaria in action during his US Open 2017 second round match 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