Maybe you’re a Roger Federer fan and agree with the Swiss legend that the ball is yellow. Or, maybe you’re a Rafael Nadal fan and, out of principle, side with green.

The International Tennis Federation introduced yellow balls into the rules of the sport in 1972 “as research had shown these balls to be more visible to television viewers.” Ironically ...

A yellow version of the Titleist Pro V1 and Pro V1x golf ball will be introduced in 2019 with the next generation of the game’s most played and top-selling golf balls. The announcement came ...