Valentino Rossi Nicknamed The Doctor, is an Italian former professional motorcycle road racer and nine-time Grand Prix motorcycle racing World Champion. The Doctor, he is widely considered to be one of the greatest motorcycle racers of all time, with some labelling him as the greatest ever. He has nine Grand Prix World Championships to his name, seven of which were in the premier 500cc/MotoGP class. He holds the record of most premier class victories, with 89 victories to his name. He won premier class World Championships with both Honda and Yamaha. He is also the only road racer to have competed in 400 or more Grands Prix, and rode with the number 46 for his entire career.