Another legendary celebrity athlete, another unbelievable bank account. Roger Federer is considered one of the best tennis players to ever pick up a racket. He’s won numerous championships, and isn’t letting up any time soon. When Federer was only 22 years old, he took his massive wealth and influence and started the Roger Federer Foundation to help disadvantaged children and their education. Now, in his 30s, it’s estimated the star athlete is worth a cool $400 million.