Age: 29

The world's top tennis player has been on a remarkable run where he banked $82 million and 11 Grand Slam titles over the past 5 1/2 years (his Slam count sits at 12, including his 2008 Australian Open win). In 2015, Djokovic was the first player to ever earn $20 million in prize money in a season. Djokovic's endorsement partners include Uniqlo, Adidas, Head, ANZ, Peugot and Seiko.