Tennis legends Roger Federer and Novak Djokovic have both made millions from their careers on the court, but the Swiss has also shown his business nous away from the game

Serbian great Novak Djokovic defeated Sebastian Korda 6-3, 7-6(4) in a quarterfinal clash that was postponed from Wednesday and became the oldest ATP Masters 1000 semi-finalist in the series history.

Roger Federer has turned his sporting success into financial triumph with a shrewd investment that dwarfs his tennis earnings. The Swiss legend's 3% stake in On Running has ballooned to an astonishing £277m ($360m).