Marquez has been unbeatable at the Circuit of the Americas.
Although Marquez was on pole position for the AmericasGP, he was robbed off the top spot since he was handed a three-place penalty, owing to an incident between him and Vinales during qualifying. "I crashed and had to take my second bike for the second run", Marquez said. "So I was looking at Iannone and I didn't expect Maverick". So tomorrow I'll start from fourth.
Despite a penalty that cost him three positions at the start of the race on Sunday, he sped forward, slipping by Maverick Viñales (Yamaha YZR M1) and France's Johann Zarco (Yamaha YZR M1), reports Efe.
"I'm scared on the track when I'm with Marquez", Rossi had said. "We'll try and remain fully concentrated".
Repsol Honda rider and defending champion Marc Marquez has an impeccable record at the Circuit of the Americas in Austin Texas.
Vinales was on a quick lap and set to challenge Marquez's provisional pole benchmark when he came up on the Honda rider in the final sector and was forced to back out, gesticulating angrily at Marquez as he rode past.
The Movistar Yamaha rider finished fourth behind eventual victor Marc Marquez, teammate Maverick Vinales and Andrea Ianonne at the Circuit of the Americas, but later said he could have put up more of a challenge of it were not for the hot conditions.
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The rally followed earlier demonstrations around the country in response to the February 14 school shooting in Parkland, Fla . However, she said the turnout Friday shows a strong group of students are dedicated to advocating for stronger gun laws.
When asked by BT Sport whether the Argentina controversy spurred him on Marquez replied: "Yes".
Andrea Iannone (Team Suzuki Ecstar) - another man who has been key competition for Marquez in practice - took third.
Rossi was back in fourth, while Dani Pedrosa secured a magnificent seventh place considering he only underwent wrist surgery last week.
Pol Espargaro (KTM), top rookie Takaaki Nakagami (LCR Honda) and Alvaro Bautista (Nieto Ducati) completed the scorers.
The former champion was also passed by Tito Rabat and Aleix Espargaro, and ended his day in 11th, while Rabat went on to steal eighth from Miller.
After today's race, there's a reshuffle in the championship standings again as Dovizioso (46) now leads the tally from Marquez by just one point.