Νέα Υόρκη - 7 Σεπτεμβρίου 2018: 13-χρόνος Grand Slam πρωταθλητής Νόβακ Τζόκοβιτς της Σερβίας σε δράση κατά τη διάρκεια του Us Open ημιτελικό αγώνα του 2018 στο Billie Jean βασιλιά εθνικό κέντρο αντισφαίρισης - Φωτογραφίες & Εικόνες Αρχείου

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 9, 2018: 2018 US Open Champion Novak Djokovic of Serbia in action during his final match against Juan Martin del Potro at USTA National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open Round of 32 match at Billie Jean King National Tennis Center

NEW YORK - AUGUST 26, 2019: Grand Slam Champion Novak Djokovic of Serbia in action during his 2019 US Open first round match at Billie Jean King National Tennis Center in New York

NEW YORK - SEPTEMBER 9, 2018: 2018 US Open Champion Novak Djokovic of Serbia in action during his final match against Juan Martin del Potro at USTA National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open Round of 32 match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open Round of 32 match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 3, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open round of 16 match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 9, 2018: 2018 US Open Champion Novak Djokovic of Serbia in action during his final match against Juan Martin del Potro at USTA National Tennis Center

NEW YORK - SEPTEMBER 9, 2018: 2018 US Open Champion Novak Djokovic of Serbia in action during his final match against Juan Martin del Potro at USTA National Tennis Center

NEW YORK - SEPTEMBER 9, 2018: 2018 US Open Champion Novak Djokovic of Serbia in action during his final match against Juan Martin del Potro at USTA National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open Round of 32 match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open Round of 32 match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia celebrates victory after his 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia celebrates victory after his 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia celebrates victory after his 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia celebrates victory after his 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open Round of 32 match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open Round of 32 match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 9, 2018: 2018 US Open Champion Novak Djokovic of Serbia in action during his final match against Juan Martin del Potro at USTA National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia celebrates victory after his 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open semi-final match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 3, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open round of 16 match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 7, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open semi-final match at Billie Jean King National Tennis Center