I just finished two sports books, one of which is a great read. I heartily recommend One on One; Behind the Scenes with the Greats in the Game by John Feinstein. Feinstein described sports figures who were part of his varied sports books. You will get his honest opinions and experiences with Bobby Knight, John McEnroe, Tiger Woods (Feinstein is not a fan), Dean Smith, Mike Krzyzewski and many others.
The chapter on the players and coaches around his book on the Army-Navy game is worth the price of the book on its own.
I also skimmed through Rafa by John Carlin and Rafael Nadal about the current #2 or #3 tennis player in the world. It's a bit early to judge Rafa's eventual place in the tennis world. The book's tone and content mirrors Rafa's tennis, workmanlike and very professional. There is very little gossip or inside stories about other tennis players. The book covers Rafa's support team, regimen and rituals around his game. The book also focuses on Rafa's first Wimbledon victory over Roger Federer his closest rival at that time.