Valentino Rossi is an Italian racing driver, former professional motorcycle road racer and nine-time Grand Prix motorcycle racing World Champion. Nicknamed "the Doctor", Rossi is widely considered one of the greatest motorcycle racers of all time. He is also the only road racer to have competed in 400 or more Grands Prix. Of Rossi's nine Grand Prix World Championships, seven were in the premier 500cc/MotoGP class. He holds the record for most premier class victories and podiums, with 89 victories and 199 podiums to his name.
Rossi's motorcycle racing career spanned the transition from the two-stroke era of the 1990s to the MotoGP four-stroke era of the 21st Century. After winning World Championships in the 125 and 250 classes, he won the final 500cc World Championship of the two-stroke era in 2000. Rossi won MotoGP World Championships with the factory Repsol Honda team in 2002 and 2003 and with Yamaha in 2004 and 2005. After two less successful seasons, he regained the title in 2008 and retained it in 2009. After a 2010 season marred by a broken leg and no title defense, he left Yamaha to join the Ducati factory team, but endured two winless seasons with the Italian marque.