Ducati's Bagnaia wins Americas GP after Marc Marquez crashes out

AUSTIN :Ducati's Francesco Bagnaia won a chaotic Americas Grand Prix ahead of Gresini Racing's Alex Marquez on Sunday after leader Marc Marquez crashed halfway through the race to lose for the first time this season.

Marquez had clinched pole position in qualifying as well as a third straight sprint victory on Saturday, but after a first crash on the red Ducati, the six-times MotoGP champion opted to retire due to extensive damage on his bike.

Although Bagnaia took the chequered flag, it is Alex Marquez who will leave Austin as the big winner as finishing second moved him to the top of the riders' championship on 87 points, one point ahead of his elder brother Marc.

Fabio Di Giannantonio of VR46 Racing tried to catch up to Alex but ran out of laps as he finished third to give Ducati another clean sweep of the podium.