Roger Federer

Swiss tennis great Roger Federer has announced he's retiring from competition, saying that at age 41, his body is telling him the time has come. In recent years, Federer has contended with injuries and surgeries as well as a rising crop of new stars.

Of the 128 players who took part in the 1999 French Open singles tournament, Federer is the last one still playing singles on tour.

Like the small group of other billionaire athletes, most of Federer's wealth did not come directly from the game. The majority of his earnings come from lucrative ...