Marc Marquez claimed victory from pole position in the Argentina Grand Prix and top spot in the MotoGP riders' standings as reigning world champion Jorge Lorenzo crashed out at Termas de Rio Hondo.
In a race reduced to 20 laps and featuring a compulsory pit stop due to concerns over the safety of Michelin's rear tyres and changing track conditions, Repsol Honda rider Marquez hit the front early on but was forced to work hard to keep Valentino Rossi at bay.
However, it was a different story after the two leaders pitted to switch to their second bikes, Marquez pulling clear of his rival to claim an ultimately comfortable victory.
Rossi was left battling Andrea Iannone and Andrea Dovizioso for second, a place the former claimed when the two Ducati riders collided on the last lap.
Iannone attempted to pass Dovizioso on the inside at turn 12, but made contact with his team-mate and both men were sent spinning off - enabling Dani Pedrosa to take the final spot on the podium.
Lorenzo, the winner of the season-opener in Qatar last weekend, saw his race came to an end on lap six as he crashed out at turn one.