10. Marat Safin
Accolades: 421-266 career record and two Grand Slam titles
The hot-tempered Russian tennis great Marat Safin was born and raised as a Muslim. Of Tatar descent, Safin was a former No. 1 who nabbed a couple Grand Slams, has the record for broken racquets in a season (87), and is now a member of the Russian parliament. Tell us you saw this guy becoming successful politician after his tennis career.