Novak Djokovic of Serbia gestures to the crowd during their ATP Cup tennis match against Denis Shapovalov of Canada in Sydney, Friday, Jan. 10, 2020. (AP Photo/Steve Christo)
Novak Djokovic of Serbia gestures to the crowd during their ATP Cup tennis match against Denis Shapovalov of Canada in Sydney, Friday, Jan. 10, 2020. (AP Photo/Steve Christo)