Novak Djokovic out of US Open after hitting line judge with ballDjokovic was heavily favored for chance to win 18th Grand Slam9/7/2020, 2:59 AMSep 6, 2020; Flushing Meadows, New York, USA; Novak Djokovic of Serbia and a tournament official tend to a linesperson who was struck with a ball by Djokovic against Pablo Carreno Busta of Spain (not pictured) on day seven of the 2020 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Danielle Parhizkaran-USA TODAY Sports / Danielle Parhizkaran-USA TODAY Sports