Novak Djokovic got in a quick game with Mike Tyson's 9-year-old daughter, Milan, at Indian Wells on Sunday.
Milan is a budding tennis star who has trained under former Olympic boxer Mike Agassi, the father of eight-time Grand Slam champion Andre Agassi.
"Me and my wife both never in a hundred years anticipated we'd be tennis parents and traveling around the state. It's amazing," Tyson said in a 2016 interview with USA TODAY Sports. "I'm just happy to be here. (Milan) showed the aptitude for tennis, and I'm just supporting her. I'm really lost, but this is exciting."