What tennis pros look at when they pick a ball

Transcript

Before a tennis player makes a serve, they have to get in the zone. Novak Djokovic will bounce the ball, first with his racket, then with his hand. Naomi Osaka will tap her thigh. Rafael Nadal will pull his shorts, the sleeves around his shoulders, touch his nose, and then finally move his hair to the back of his ears. But there’s one ritual almost... Read More