Men
Roger Federer (1)
Age: 28.
Major titles: 16 (6 at Wimbledon).
Topspin: Defending champ has won six of last seven years; trying to join Pete Sampras and Willie Renshaw as the only men to win seven.
Rafael Nadal (2)
Age: 24.
Major titles: 7 (1 at Wimbledon).
Topspin: Coming off fifth French Open title; '08 Wimbledon champ pulled out last year because of tendinitis in knees.
Andy Murray (4)
Age: 23.
Major titles: 0.
Topspin: Brit has advanced one step farther each time he has competed at Wimbledon, reaching the semis last year.
Andy Roddick (5)
Age: 27.
Major titles: 1.
Topspin: Three-time runner-up at Wimbledon, losing in the final to Federer each time.
Robin Soderling (6)
Age: 25.
Major titles: 0.
Topspin: After stunning Nadal in fourth round of French Open last year, upset Federer in the quarterfinals at Roland Garros this year.
Women
Serena Williams (1)
Age: 28.
Major titles: 12 (3 at Wimbledon).
Topspin: Reached the final in five of her last seven appearances at All England Club.
Venus Williams (2)
Age: 30.
Major titles: 7 (5 at Wimbledon).
Topspin: Champion or runner-up eight of the last 10 years; the three losses in finals all came against younger sister Serena.
Kim Clijsters (8)
Age: 27.
Major titles: 2.
Topspin: Reigning U.S. Open champ returns to All England Club for the first time since 2006.
Maria Sharapova (16)
Age: 23.
Major titles: 3 (1 at Wimbledon).
Topspin: Still trying to return to top of game after right shoulder surgery in October 2008, right elbow injury this season.
Justine Henin (17)
Age: 28.
Major titles: 7.
Topspin: Wimbledon is only Grand Slam event she hasn't won; she cited that when explaining why she ended 20-month retirement.
— Associated Press