World championship leader Fabio Quartararo extended his lead in the standings with a dominant victory at the Catalunya Grand Prix on Sunday as home favourite Aleix Espargaro threw away a podium position with an embarrassing mistake on the final lap.

World c'ship leader Fabio Quartararo wins Catalunya GP after home favourite Aleix Espargaro's mistake

Italian MotoGP rider Andrea Iannone has been provisionally suspended after testing positive for a banned substance, the governing body FIM said on Tuesday. It said a urine sample provided by the Aprilia rider at the Malaysian Grand Prix on November 3 had shown an "adverse analytical finding of a non-specified substance under Section 1.

Motorcycling: MotoGP rider Iannone suspended for positive dope test

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World c'ship leader Fabio Quartararo wins Catalunya GP after home favourite Aleix Espargaro's mistake

Motorcycling: MotoGP rider Iannone suspended for positive dope test