Marco Bezzecchi won another Aprilia-dominated MotoGP grand prix, leading team-mate Jorge Martin across the finish line in the Grand Prix of the Americas.

Bezzecchi shrugged off a two-place grid penalty for impeding in Q2 to take an early lead from fourth on the grid and lead all 20 laps of the race at the Circuit of the Americas.

It means he has now led 121 consecutive grand prix laps - a new MotoGP record - en route to five consecutive grand prix wins.

On another Sunday on which the Aprilia RS-GP was clearly the bike to have, Bezzecchi was rapid off the line to settle in behind initial race leader Pedro Acosta.

Then when Acosta badly overshot Turn 11 and rode the outside kerb, he and Bezzecchi made contact on corner exit, with both bikes clearly shedding debris.

But despite visible damage to the Aprilia Bezzecchi had little issue controlling the race from there, first heading up a three-bike breakaway pack with Acosta and Martin, then establishing a crucial gap to Acosta on the sixth lap.

By the time Martin got back past Acosta, aided by the KTM rider going wide at Turn 1, Bezzecchi was 1.7s clear. 

Martin reduced that advantage to less than a second at one point, but ultimately had to accept defeat and second place, relinquishing the championship lead to his team-mate - with the pair now four points apart at the top of the standings.

Acosta brought it home in a lonely third, with VR46 Ducati rider Fabio Di Giannantonio an equally lonely fourth. Both were aided by a sudden technical issue for Ai Ogura - which looked like a gearbox failure - as the Trackhouse Aprilia rider had cleared Di Giannantonio and looked likely to motor past Acosta, too, when the problem struck.

"Honestly, it seems crazy but I'm disappointed for Ai Ogura. I mean, it shouldn't happen. I'm really sorry for Trackhouse," said Aprilia racing boss Massimo Rivola.

"I think now it's clear that so far the best bike is Aprilia."

Di Giannantonio had lost a lot of ground off pole and was delayed by an early tussle with Marc Marquez before consolidating his position.

Marquez had an unremarkable COTA race by his standards, not helped by needing to serve a long-lap penalty for his collision with Di Giannantonio on Saturday.

After a scruffy few opening laps, serving that penalty dropped him from seventh to 11th - but he worked his way back up to fifth by the end, via a multi-lap tussle with Tech3 KTM's Enea Bastianini.

Both cleared Pecco Bagnaia in the process, the Ducati rider fading terribly in the closing laps from an initial fifth place.

Running several seconds off the pace, he got overtaken by Alex Marquez, Raul Fernandez and Luca Marini in quick succession to finish 10th.

There were two crashes from the race, both by Honda riders - with Johann Zarco down from 13th early on and Joan Mir crashing from well within the top 10 yet again, shortly after receiving a long-lap penalty for cutting the track that he never ended up serving.

The attrition enabled the outmatched Yamaha contingent to at least bring home a single point - that point coming courtesy of rookie Toprak Razgatlioglu.