Misano Adriatico - World champion Marc Marquez of Spain won the San Marino MotoGP in slippery conditions on Sunday to join Italy's Andrea Dovizioso at the top of the world championship standings.
Marquez, on a Honda, finished ahead of Italy's Ducati rider Danilo Petrucci on a wet track with Dovizioso, also on a Ducati, finishing third.
Both Marquez and Dovizioso have 199 points in the world championship standings with five races left in the season.
Earlier Swiss rider Dominique Agerter (Suter) won the San Moto2 Grand Prix ahead of Kalex duo Thomas Luthi of Switzerland and Malaysian Hafizh Syahrin, to claim his second career win.
Italy's Romano Fenati of Honda defied driving rain to claim his eighth career win in Moto3.
In a race hampered by numerous falls and skids off the track, Fenati finished ahead of Spanish world champion leader Joan Mir and Italy's Fabio Di Giannantonio, both also riding for Honda.
San Marino motorcycling Grand Prix results on Sunday:
MotoGP
1. Marc Marquez (ESP/Honda) 50min 41.565sec, 2. Danilo Petrucci (ITA/Ducati) 1.192, 3. Andrea Dovizioso (ITA/Ducati) 11.706, 4. Maverick Vinales (ESP/Yamaha) 16.559, 5. Michele Pirro (ITA/Ducati) 19.499, 6. Jack Miller (AUS/Honda) 24.882, 7. Scott Redding (GBR/Ducati Pramac) 33.872, 8. Alex Rins (ESP/Suzuki) 34.662, 9. Jonas Folger (GER/ Yahama Tech3) 54.082, 10. Bradley Smith (GBR/KTM) 57.964
Overall standings
1. Marc Marquez (ESP/Honda) 199 pts, 2. Andrea Dovizioso (ITA/Ducati) 199, 3. Maverick Vinales (ESP/Yamaha) 183, 4. Valentino Rossi (ITA/Yamaha) 157, 5. Dani Pedrosa (ESP/Honda) 150, 6. Johann Zarco (FRA/Yamaha Tech3) 110, 7. Danilo Petrucci (ITA/Ducati) 95, 8. Cal Crutchlow (GBR/LCR Honda) 92, 9. Jorge Lorenzo (ESP/Ducati) 90, 10. Jonas Folger (GER/ Yahama Tech3) 84
Moto 2
1. Dominique gerter (SUI/Suter) 51min 39.709sec, 2. Thomas Lthi (SUI/Kalex) at 1.400sec, 3. Hafizh Syahrin (MAS/Kalex) 7.875, 4. Francesco Bagnaia (ITA/Kalex) 21.223, 5. Brad Binder (RSA/KTM) 23.849, 6. Sandro Cortese (GER/Suter) 41.421, 7. Fabio Quartararo (FRA/Kalex) 43.107, 8. Simone Corsi (ITA/Speed Up) 56.926, 9. Khairul Idham Pawi (MAS/Kalex) 1:01.495, 10. Jesko Raffin (SWI/Kalex) 1:20.192
Overall standings
1. Franco Morbidelli (ITA/Kalex) 223pts, 2. Thomas Lthi (SUI/Kalex) 214, 3. Alex Marquez (ESP/Kalex) 155, 4. Miguel Oliveira (POR/KTM) 141, 5. Francesco Bagnaia (ITA/Kalex) 124, 6. Takaaki Nakagami (JPN/Kalex) 109, 7. Mattia Pasini (ITA/Kalex) 104, 8. Dominique gerter (SUI/Suter) 88, 9. Simone Corsi (ITA/Speed Up) 86, 10. Hafizh Syahrin (MAL/Kalex) 66
Moto 3
1. Romano Fenati (ITA/Honda) 46min 24.290sec, 2. Joan Mir (ESP/Honda) at 28.594sec, 3. Fabio Di Giannantonio (ITA/Honda) 39.035, 4. Philipp Oettl (GER/KTM) 55.591, 5. Nicolo Bulega (ITA/KTM) 1:02.433, 6. Bo Bendsneyder (NED/KTM) 1:09.312, 7. Jakub Kornfeil (CZE/Peugeot) 1:09.994, 8. Albert Arenas (SPA/Mahindra) 1:13.420, 9. Andrea Migno (ITA/KTM) 1:22.747, 10. Jaume Masia (ESP/KTM) 1:32.446
Overall world standings
1. Joan Mir (ESP/Honda) 246pts, 2. Romano Fenati (ITA/Honda) 185, 3. Aron Canet (ESP/Honda) 162, 4. Jorge Martn (ESP/Honda) 121, 5. Fabio Di Giannantonio (ITA/Honda) 117, 6. Andrea Migno (ITA/KTM) 98, 7. John McPhee (GBR/Honda) 96, 8. Marcos Ramrez (ESP/KTM) 96, 9. Enea Bastianini (ITA/Honda) 87, 10. Philipp Oettl (GER/KTM) 84