Valentino Rossi extended his Moto GP championship lead after a fascinating duel with Casey Stoner saw him claim his maiden victory at the United States MotoGP at Laguna Seca. There had been nothing to choose between the pair until Stoner rode into the gravel with eight laps remaining and although he managed to get back into the race, the Australian could not claw back the gap. However, the duo had built up such a lead that the Ducati of Stoner was still able to finish ahead of Chris Vermeulen in third with Britain’s James Toseland finishing ninth.

Per la prima volta, Valentino Rossi trionfa nel GP degli Stati Uniti: subito in fuga insieme all’australiano (polemico a fine gara), ha approfittato di un errore del pilota della Ducati a 8 giri dal termine e lo ha preceduto sul traguardo, portandosi a +25 sul rivale nel Mondiale. Terzo Vermeulen, quarto Dovizioso.