Novak Djokovic

Serbia's Djokovic loses to Spain's Pablo Carreño Busta, ending his chances of winning a bronze in Tokyo. "I gave it all, whatever I had left in the tank, which was not so much," Djokovic says.

The Serbian star was beaten in the men's tennis semifinal by Germany's Alexander Zverev. It means Djokovic can't make history by winning all four major tournaments and Olympic gold in a single year.

The Serbian tennis star is aiming for a "golden slam" — meaning winning all four major tournaments and an Olympic gold medal in a single year. No male tennis player has ever done it.

Rachel Martin talks tennis and the Australian Open with Mike Pesca, host of Slate's "The Gist."