Saturday's Dutch MotoGP at Assen saw a dominant first grand prix victory for Ben Spies, while Casey Stoner extended his points lead to 28 with a safe second place in the cool and moist conditions.

Andrea Dovizioso rose to third in the championship with his third rostrum of the year, while Valentino Rossi rode from eleventh to fourth in his first race with the new Ducati GP11.1.

Injured rookie Cal Crutchlow qualified an equal-MotoGP best - and ran as high as fourth in the race - before being forced to pit with front tyre problems.

World champion Jorge Lorenzo, after being brought down in Marco Simoncelli's first lap crash, mounted an admirable charge from 14th to sixth to limit the points manage as much as he could.

In the Moto2 class Marc Marquez defied his wild-man image to win his second race of the season in risky conditions, with World Supersport champion Kenan Sofuoglu claiming his first ever grand prix podium in second.

Bradley Smith led much of the race on his way to third on the all-rookie rostrum.

Like Marquez, 125cc rookie Maverick Vinales took his second win of the season on Saturday, the 16-year-old looking every inch a grand prix veteran as he took control of a race halted early due to rain.

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