The modern U.S. Open tennis player is a master of racquet minutiae. In pursuit of the tiniest advantage, tennis stars tinker with their racquet's weight, balance, string properties and handle size.

Novak Djokovic uses one. So does Aryna Sabalenka. Along with the current world No.1s, many other touring pros and discerning players prefer racquets with 18x20 string patterns. The narrower string ...

Every day at the U.S. Open, Serena and Venus Williams will walk out to either a practice court or a match with six racquets in their respective bags. They might use two of them. After every use, they ...

Once a blip on the racquet-spec radar, string pattern has become an increasingly important—and complicated—consideration. Here are a few things you should know about strings before your next racquet ...