Once upon a time, tennis balls had a whole different vibe. Now they're serving looks in neon—and for a very good reason.

Technical Tennis: Racquets, Strings, Balls, Courts, Spin, and Bounce by Rod Cross & Crawford Lindsay (Racquet Tech Publishing) True or false: Lower string tension produces more power; lighter ...

Sending those rubber-cored balls to the landfill is just part of the environmental toll they take. Fortunately, there are more sustainable alternatives. Roughly 125 million tennis balls are ...