Rafael Nadal is the world number 1 and he is favored to win each Slam in 2011.
Rafael Nadal has a career Slam but he can sweep all 4 of them in a row by winning the 2011 Australian Open. Who exactly Nadal's clear challenger is at this point is not really clear as Rafa has faced 3 different players in each of his 3 recent Grand Slam final matches.
Novak Djokovic is the second ranked player on tour but he was not close to beating Nadal in the final of the US Open. Since the hard courts are Djokovic's best surfaces and Nadal's worst, the Serbian is actually a distant second on tour.
Here are Nadal's odds for the 2011 Grand Slams, all to win outright:
Take Nadal at +250 to win the Australian Open with Victor Chandler and take Nadal at -255 (4/9) to win the French Open with bet365. The 2011 US Open is too far off to bother with at this point as you don't want to tie up your bankroll on a market that will take a full year to resolve.
Register with bet365 to back Nadal to win the French Open - take advantage of their deposit bonus to receive free bets that can be used on Grand Slam tennis in 2010.