According to a report in Sports Illustrated, Roger Federer is the world's second highest-earning athlete with estimated earnings of more than $61.7 million. Hot on his heels is golfer Phil Mickelson with $61.6 million. No prize for guessing who is ranked No.1 on the earnings list - runaway leader Tiger Woods with $90 million. Rafael Nadal is the next-highest tennis player, coming in at No. 9 with over $27 million in earnings. Maria Sharapova is at No. 20 with almost $20 million, the only woman on the top 20 list.