 Rebellin is best known in the cycling world for his 2004 season, when he won a then unprecedented treble with wins in Amstel Gold Race, La Flèche Wallonne and Liège–Bastogne–Liège.He has also won stage races such as Paris–Nice and Tirreno–Adriatico, and a stage in the Giro d'Italia.Rebellin served a 2-year suspension for testing positive for Mircera at the 2008 Olympic Games.