Νέα Υόρκη - 22 Αυγούστου 2018: 20-χρόνος Grand Slam πρωταθλητή Roger Federer Ελβετία πρακτικές για το 2018 Us Open στο Billie Jean βασιλιά εθνικό κέντρο αντισφαίρισης - Φωτογραφίες & Εικόνες Αρχείου

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 - 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 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 - 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 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 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 - 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 1, 2015: Seventeen times Grand Slam champion Roger Federer of Switzerland in action during first round US Open 2015 match at National Tennis Center in NY

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 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 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 - 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 6 Seventeen times Grand Slam champion Roger Federer during semifinal match at US Open 2014 against Marin Cilic at Arthur Ashe Stadium on September 6, 2014 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, 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

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 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 7 Grand Slam champion Pat Cash during US Open 2014 champions exhibition match at Billie Jean King National Tennis Center on September 7, 2014 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 - 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

FLUSHING, NY -SEPTEMBER 2: Seventeen times Grand Slam champion Roger Federer during his fourth round match at US Open 2013 against Tommy Robredo at Billie Jean King National Tennis Center on September 2, 2013 in Flushing, NY

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 Seventeen times Grand Slam champion Roger Federer during semifinal match at US Open 2014 against Marin Cilic at Arthur Ashe Stadium on September 6, 2014 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 NY

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 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 -SEPTEMBER 2: Seventeen times Grand Slam champion Roger Federer during his fourth round match at US Open 2013 against Tommy Robredo at Billie Jean King National Tennis Center on September 2, 2013 in Flushing, NY

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

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 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