Even though a lot of attention in tennis is on young blood like Djokovic and Murray, Nadal was the sport’s biggest moneymaker in 2013, with $14.57 million in ATP World Tour winnings. He’s got lucrative endorsement deals with Nike, Babolat, Richard Mile, KIA, Mapfre, Banco Sabadell and Poker Stars — many of which included big bonuses for tournament wins.