This is particularly true on the running forehand ... will increase your shoulder rotation.) Run to the ball and then slide into position with your outside foot (the right foot for right-handed ...

High-speed video from the 1997 US Open showed Williams averaging over 2,000 r.p.m. on her forehand ... at the right sideline. Her radical upper body turn substantially increases her shoulder ...

Some players rotate their hand a little further — for Gauff, a right-handed player ... the most vulnerable things a tennis player can do. Initially, Gauff’s forehand looked to need a grip ...