Quote from Jerry in The Switch
[stand-up:] Jerry: Tennis is the only sport where the uniform is what you would wear under your clothes in any other sport. You're actually out there in your underwear. Unless in the old days, you know, they would wear those long pants and the big heavy sweaters. How long did it take them to get over that? We're out here in the hot sun, running around after a ball. What exactly are we all dressed up for? Maybe that's why they started keeping score like that. "Point? You know what? Make it 15. I'm dying in this sweater here!". "Oh, another one got by me? Take another 10 points. Let's just get this over with!".