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KARIM SAHIB/AFP/Getty Images
Power 100 rank: 11
Sport: ATP Tennis
Most recent notable achievement: Won 2009 Australian Open
Earnings: $31.5 million
Key sponsors: Nike, Kia, Babolat
Why he's on the list: Though knee injuries derailed the Spaniard's attempt at overtaking Roger Federer as the world's top player, Nadal plays with his heart on his sleeve to the delight of marketers and female fans around the globe.