Not only are there line judges and chair umpires, who remove the arguments we have about whether the ball was in or not, but they’ve also got new tennis balls to play with any time they wish ...

The International Tennis Federation (ITF) oversees the official ball, but the accepted range of size and weight allow for variances from ball to ball. Tennis balls must measure from 2.57 to 2.70 ...

Orange tennis balls. Also called stage 2, orange tennis balls were developed to be one step up from red. They’re still larger than a regular tennis ball and designed for use on a 60-foot court, ...