Tennis coach Rick Macci knew Venus and Serena Williams were going to be superstars before they even knew themselves. From reinventing serves to helping Venus embrace the power of her unique backhand, Rick explains how he has helped the Williams' sisters transform the sport of tennis since the 1990s. With GQ Sports, the real action is off the field. Get an all-access pass to the world's coolest, most stylish athletes with original series like My Essentials, Actually Me, My First Million, Game Points & More. Watch a GQ editor try his hand at pro sports in Above Average Joe. And get an all-access look into how athletes shop, train, travel, and showcase their love of style, menswear, and sneakers.