Before the 2002 Tour de Romandie, Hustov was tested with a hematocrit level above fifty percent, which indicates doping usage and he was suspended for fifteen days, but in the middle of May, Fassa Bortolo announced that he could ride again. After laboratory tests accredited by the Union Cycliste Internationale (UCI), the governing body of cycling, it was stated that his high hematocrit and hemoglobin values were physiologically determined. As his contract ended prior to the 2006 season, former team mate Ivan Basso arranged for him to ride alongside him at Danish Team CSC.
After being selected for the 2008 Tour de France team, he worked for the two Schleck brothers and Carlos Sastre as the race got into the French Alps and Pyrenees.