How about this for a slight twist to the alternate history...
Earl Woods puts a tennis racket in the hands of his young son Eldrick.
Meanwhile, Richard Williams senses great potential in his two young daughters and has Serena and Venus out on the Long Beach muni's before they are 3 years old. They grow up to dominate the LPGA while still in their teens, and then set their sights on bigger game, becoming the first women to qualify for the PGA tour. Five years later, young phenom Michelle Wie pays tribute to the Williams sisters, "They led the way and showed girls like me that anything is possible."
Actually, guys, maybe I'm wrong but I don't think the tennis has much of anything to do with the story.