MotoGP legend Valentino Rossi has paid tribute to his good friend Marco Simoncelli, who lost his life in an accident at the Malaysian Grand Prix in Sepang yesterday.

Italian motorcyclist Marco Simoncelli has been killed in a crash during today’s Malaysian Moto GP, race organisers have confirmed.

The Malaysian Moto GP has been cancelled after Italian Marco Simoncelli suffered what appeared a serious injury in a crash in Sepang.

Max Biaggi made up for his crash in last year's Czech Republic race to win the latest MotoGP round at Brno.