Νέα Υόρκη-31 Αυγούστου, 2019: επαγγελματίας τενίστρια Αλέξανδρος Zverev της Γερμανίας σε δράση κατά τη διάρκεια του 2019 US ανοιχτό τρίτο γύρο αγώνα στο εθνικό κέντρο τένις Μπίλυ Jean King - Φωτογραφίες & Εικόνες Αρχείου

NEW YORK - AUGUST 27, 2019: Professional tennis player Stefanos Tsitsipas of Greece in action during his 2019 US Open first round match 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

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 - 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 - SEPTEMBER 2, 2017: Professional tennis player Dominic Thiem of Austria in action during his US Open 2017 round 3 match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 21, 2018: Professional tennis player Alexander Zverev of Germany in practice for 2018 US Open at Billie Jean King National Tennis Center

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 31, 2019: Professional tennis player Alexander Zverev of Germany in action during his 2019 US Open third round match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 31, 2019: 18-time Grand Slam champion Rafael Nadal of Spain in action during his 2019 US Open third round match at Billie Jean King National Tennis Center in New York

NEW YORK - AUGUST 31, 2019: Professional tennis player Alexander Zverev of Germany in action during his 2019 US Open third round match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 10, 2017: Grand Slam champion Rafael Nadal of Spain in action during his US Open 2017 final match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 29 Twelve times Grand Slam champion Rafael Nadal during second round match at US Open 2013 against Rogerio Dutra Silva at Arthur Ashe Stadium on August 29, 2013 in New York

NEW YORK - SEPTEMBER 3, 2016: Grand Slam champion Juan Martin Del Porto of Argentina in action during his US Open 2016 round 3 match at the Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 3, 2016: Grand Slam champion Rafael Nadal of Spain in practice for US Open 2016 at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 3, 2016: Grand Slam champion Rafael Nadal of Spain in practice for US Open 2016 at Billie Jean King National Tennis Center

NEW YORK - AUGUST 27, 2019: 18-time Grand Slam champion Rafael Nadal of Spain in action during his 2019 US Open first round match at Billie Jean King National Tennis Center in New York

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