In boxing, a quadruple champion is a boxer who has won world titles in four different weight classes.
Juha Kankkunen and Tommi Mäkinen both won four World Rally Championships.
Yvan Muller is the only person to win four World Touring Car Championships.
Olivier Gendebien, Henri Pescarolo and Yannick Dalmas have all won the Le Mans 24 hour race four times.
Cris Cyborg is the only fighter, male or female, to become a Quadruple Champion in MMA, winning belts in the UFC, Bellator MMA, Invicta FC and Strikeforce (mixed martial arts).