Roger Federer has become the world's richest tennis player, with career prize money earnings listed as a staggering 71 million dollars.
Federer's passage into the third round of the ATP Madrid Masters event has seen the Swiss player edge past former world number one Pete Sampras of the United States.
Federer and Sampras, with 13 and 14 Grand Slams win each, stand almost 20 million dollars clear of third-placed Andre Agassi.
Current world No.1 Rafael Nadal stands eighth in the list with 36 million dollars in earnings, while legends Bjorn Borg, John McEnroe and Jimmy Connors do not even make it into the top 10.
