Quartararo’s points lead had settled on 10 points before this round, but his worst result this season and Merer’s third means he is now six points behind the Spaniard, with 15 points covering the top four.
Franco Morbidelli got the hatch in the first corner of the line, but the Petronas SRT racer ran wide and allowed Maverick Vinales and Quartararo to move.
Vinales used the early grip feature of his soft front frame to put seven-tenths of daylight between himself and Quartararo, while Rins jumped from 10The tenth To fourth place.
Quartararo resisted an attack from teammate Morbidelli at Turn 12 on the opening lap, the latter’s pace quickly slowed down and Rins soon found a way.
The lead gap narrowed slightly to half a second, but Reigns’ attack continued and took advantage when the Frenchman ran into the last corner at the end of the fifth lap to take second place.
Quartaro ran over and over again into the last two corners and his speed deteriorated dramatically over the next 10 rounds, and the Petronas rider lost points at 17The tenth On lap 15.
Reigns led Vinales into the final corner on the eighth lap, with the Yamaha contestant falling into the clutches of Suzuki Mir’s sister after a brief brawl after five rounds.
Reigns’ lead stood at 1.1 seconds after that, but Mir was able to close the gap with the Marquis in the draw, as the Honda rider ran his way from 11The tenth On the web.
Reigns’ advantage slumped to just over six-tenths on lap 15, but the Mir win challenge was nothing and he was powerless to stop Marquez advancing on lap 18.
After making his first podium finish at Le Mans last week, Marquez said that the podium was not a “real target”.
But once he turned away from Mir, he quickly climbed into Reigns’ tail and piled on the pressure, immediately regrouping despite the tremendous moment as he applied the throttle in the last corner at 21U a tour.
Reigns did not make a foul through the last lap and had enough to beat Marquez by 0.263 seconds over the checkered flag to become the eighth winner in 2020.
Mir’s pace slipped on the final lap but was not enough to allow the Vinales to return to the podium, as the Suzuki rider tops the standings for the first time with six points.
Vinales are just 12 points off the championship lead after finishing fourth, as Takaki Nakagami completed the top five on his LCR Honda, ahead of Morbidelli.
Andrea Dovizioso has recovered from 13The tenth On the grid to seventh, with Quartararo’s misery means the Ducati contestant is now only 15 points off the top of the standings.
Cal Cruschlo on the LCR sister bike followed Dovizioso’s home after a surprise start from third, with Jack Miller leading Pramac’s Johan Zarco of Avintia to finish the top ten.
The head of the KTMs was Brad Bender at 11The tenth Ahead of Paul Espargaro, with Alex Espargaro in Aprilia, Iker to be from Tech3 and Danilo Petrucci (Ducati) score the last points.
Quartararo could not do more than 18 yearsThe tenth On the checkered flag, with Bradley Smith only on Aprilia and Tito a rib of Aventia behind him after Francesco Bagnaya (Bramack) crashes early.