Perfect Plan A
Plan A was executed to perfection by Marc Marquez from third on the grid, the number 93 grabbing the holeshot as Quartararo also got the better of polesitter Bagnaia.
The latter then lost another place to the fast-starting Rins (Team Suzuki Ecstar) on the opening lap, with Pecco then demoted to P5 as Martin (Pramac Racing) carved his way past on Lap 2 too.
Pecco finds rhythm
Lap 8 of 20 ticked by and Marquez slammed in a 2:04.368, his lead was now up to a second and a half over Quartararo. By 11 to go, that gap had been stretched to 2.3, with Quartararo, in turn, a second clear of Martin.
Miller was only half a second down on his fellow Ducati rider and 1.3 behind came Pecco, who had started to find some rhythm - the Italian soon passing Rins.
Championship duel rolls on
In the end though, Captain America returned to reign once again in Austin. Marquez gave Repsol Honda Team their 450th premier class podium with a classy ride at COTA, as Quartararo takes a second place that gives him his first match point of the season next time out at Misano.
Bagnaia recovered well to claim P3, but its ground lost in the Championship chase.
King of COTA is back
A dream return to COTA for Marquez sees the King reclaim his Austin crown.
And equally as happy is Quartararo, with that 52-point advantage meaning he could now win the 2021 title next time out at Misano!