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Rafael Nadal

The King of Clay, Rafa Nadal owns 14 grand slam titles — nine of which came at Roland-Garros. Nadal, who has been slowed by injuries, also has two Wimbledon and U.S. Open championships to his name. Nadal has recovered and will make a run for a 15th grand slam at the U.S. Open, which would move the Spaniard past Sampras on the all-time list.