there might be two Little League games going on at the same time, even as the tennis courts were overflowing with random action. Once, when I was 13 or so, a foul ball thudded down next to me ...

Anyone that plays tennis often knows that after some time tennis balls can lose their bounce enough to affect your game. Or ...

Modern tennis balls are made of a hollow rubber core ... cutting down the number of rallies in a match. One way of slowing the game down would be to make the balls bigger. The bigger the ball, the ...