Νέα Υόρκη - 5 Σεπτέμβριος 2016: Επαγγελματίας παίκτης του τένις Ίβο Κάρλοβιτς Hrvatske σε δράση κατά τη διάρκεια της μας ανοιχτά 2016 γύρο τέσσερα ταιριάζει στο Billie Jean βασιλιά εθνικό κέντρο αντισφαίρισης - Φωτογραφίες & Εικόνες Αρχείου

NEW YORK - SEPTEMBER 4, 2016: Professional tennis player Jack Sock of United States in action during his round four match at US Open 2016 at Billie Jean King National Tennis Center in New York

NEW YORK - AUGUST 27, 2018: Professional tennis player Karen Khachanov of Russia in action during first round match at the 2018 US Open at Billie Jean King National Tennis Center

NEW YORK - AUGUST 27, 2019: Professional tennis player Karen Khachanov of Russia in action during his 2019 US Open first round match at Billie Jean King National Tennis Center in New York

NEW YORK - SEPTEMBER 5, 2016: Professional tennis player Ivo Karlovic of Croatia in action during US Open 2016 round four match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 5, 2016: Professional tennis player Ivo Karlovic of Croatia in action during US Open 2016 round four match at Billie Jean King National Tennis Center

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 - SEPTEMBER 5, 2016: Professional tennis player Ivo Karlovic of Croatia in action during US Open 2016 round four match at Billie Jean King National Tennis Center

NEW YORK - SEPTEMBER 2, 2018: Professional tennis player John Isner of United States in action during his round of 16 match at 2018 US Open at Billie Jean King National Tennis Center in New York

NEW YORK - AUGUST 22, 2018: American retired professional tennis player James Blake in action during 2018 US Open exhibition match at newly open Louis Armstrong Stadium at National Tennis Center

NEW YORK - AUGUST 19: Two times Grand Slam Champion Lleyton Hewitt practices for US Open 2014 at Arthur Ashe Stadium at Billie Jean King National Tennis Center on August 19 , 2014 in New York

NEW YORK - AUGUST 25, 2015: Grand Slam Champion Andy Murray practices for US Open 2015 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 9, 2017: US Open 2017 mixed doubles champion Jamie Murray of Great Britain in action during final match at Billie Jean King National Tennis Center in New York

NEW YORK - AUGUST 22, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia practices for the 2018 US Open at Billie Jean King National Tennis

NEW YORK - AUGUST 22, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia practices for the 2018 US Open at Billie Jean King National Tennis

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, 2015: Professional tennis player Kei Nishikori of Japan in action during first round match at US Open 2015 at Billie Jean King National Tennis Center in New York

NEW YORK -SEPTEMBER 2, 2014: US Open 2014 champion Marin Cilic from Croatia during US Open 2014 round 4 match against Gilles Simon at Billie Jean King National Tennis Center in New York

NEW YORK - AUGUST 27, 2018: Grand Slam champion Juan Martin Del Potro of Argentina in action during his 2018 US Open first round match at Billie Jean King National Tennis Center