Marc Marquez surged into the lead during a brief rain shower and held on to win the MotoGP San Marino Grand Prix from Francesco Bagnaia, as Jorge Martin made a premature bike swap that left him 15th.
With spots of rain on the starting grid, humid and cloudy conditions briefly delivered substantial rain after seven laps of the Misano race, leading to half a dozen riders pitted to change motorcycles, including world championship leader Martin who had been running second on the Pramac Ducati.
