When their careers are over, Roger Federer, Rafael Nadal, and Novak Djokovic will be judged by the number of Grand Slam titles they win. A tight race is also shaping up between the three when it comes to career earnings.

As Federer nears the end of his career, he has already topped $80 million in earnings on the ATP Tour. Meanwhile, Nadal, who is about five years younger than Federer, is just over $11 million behind Federer and on pace to easily break $80 million.

Djokovic, whose earnings got off to a slower start, is now on a similar earnings pace as Nadal.

BusinessInsider.com

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