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

Roger Federer and Novak Djokovic have both had exceptional careers in tennis - but the Swiss has made hundreds of millions more through one savvy investment.

Since Djokovic is only 7-4 in 2025 and has already had three surprising defeats (Reilly Opelka, Brisbane - Matteo Berrettini, Doha - Botic van de Zandschulp, Indian Wells), the 37-year-old's critics have been loud recently and using his recent defeats as an argument for their claims that it is time for the world No. 7 to walk away from pro tennis.