INDIANAPOLIS – Tensions flared between Romain Grosjean and Marcus Armstrong following Saturday's Sonsio Grand Prix at the Indianapolis Motor Speedway.
After getting out of his car, Grosjean — who finished 21st in the race — approached the pit box of Armstrong — who finished 11th. Video captured outside of Armstrong's pit box shows Grosjean making his way to confront Armstrong after initially being held back by members of Armstrong's No. 66 pit crew.
"Get off," Grosjean said to the crew members in a video captured by Racer Magazine. "I was going to talk to him. I was going to say I want to punch you."
Grosjean eventually got face-to-face with Armstrong while crew members stepped between them.
"I have never punched anyone in my life," he proceeded to say.
It is unclear what caused the dispute between the two drivers, who finished 10 spots apart in the race and whose pit boxes were 10 spots away from one another.
"He fancied a bit of a fist fight, actually," Armstrong told Fox. "A bit of UFC, a bit of MMA — something I'm not accustomed to. But hey, you know what, I've got like a 350-pound fueler who was like right behind me, so fair play to Romain, he's got some balls for trying to attack me with him behind me."
Grosjean is not believed to have actually struck Armstrong.
Zion Brown is IndyStar's motorsports reporter. Follow him at @z10nbr0wn. Get IndyStar's motor sports coverage sent directly to your inbox with our Motor Sports newsletter. Subscribe to the YouTube channel IndyStar TV: IndyCar for a behind-the-scenes look at IndyCar and expert analysis.
Crews tend to Chip Ganassi Racing driver Scott Dixon (9) and A.J. Foyt Enterprises driver Caio Collet (4) in the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
Juncos Hollinger Racing driver Rinus Veekay (76) drives a damaged car after contact on the first lap Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
Smoke rises from the cars of Chip Ganassi Racing driver Scott Dixon (9) and A.J. Foyt Enterprises driver Caio Collet (4) in the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
Chip Ganassi Racing driver Alex Palou (10) looks up at the flyover Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
Team Penske driver Josef Newgarden (2) walks pit road Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
Arrow McLaren driver Christian Lundgaard (7) stands on the grid Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
Chip Ganassi Racing driver Alex Palou (10) talks with team owner Chip Ganassi on Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
Arrow McLaren driver Pato O’Ward (5) prepares to get in his car Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
Team Penske driver David Malukas (12) stands on the grid Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
A.J. Foyt Enterprises driver Santino Ferrucci (14) talks on the grid Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
Rahal Letterman Lanigan Racing driver Mick Schumacher (47) prepares to get in his car Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
Chip Ganassi Racing driver Alex Palou (10) looks up at the flyover Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
Crews tend to Chip Ganassi Racing driver Scott Dixon (9) and A.J. Foyt Enterprises driver Caio Collet (4) in the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
A KC-135 Stratotanker flies over the track Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
Crews tend to Chip Ganassi Racing driver Scott Dixon (9) and A.J. Foyt Enterprises driver Caio Collet (4) in the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.1 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Crews tend to Chip Ganassi Racing driver Scott Dixon (9) and A.J. Foyt Enterprises driver Caio Collet (4) in the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
1 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Crews tend to Chip Ganassi Racing driver Scott Dixon (9) and A.J. Foyt Enterprises driver Caio Collet (4) in the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
2 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
3 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
4 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Juncos Hollinger Racing driver Rinus Veekay (76) drives a damaged car after contact on the first lap Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
5 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Smoke rises from the cars of Chip Ganassi Racing driver Scott Dixon (9) and A.J. Foyt Enterprises driver Caio Collet (4) in the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
6 / 26
IndyCar comes to the 2026 Sonsio Grand Prix at Indianapolis Motor Speedway
Chip Ganassi Racing driver Alex Palou (10) looks up at the flyover Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
7 / 26
IndyCar comes to the 2026 Sonsio Grand Prix at Indianapolis Motor Speedway
Team Penske driver Josef Newgarden (2) walks pit road Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
8 / 26
IndyCar comes to the 2026 Sonsio Grand Prix at Indianapolis Motor Speedway
Arrow McLaren driver Christian Lundgaard (7) stands on the grid Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
9 / 26
IndyCar comes to the 2026 Sonsio Grand Prix at Indianapolis Motor Speedway
Chip Ganassi Racing driver Alex Palou (10) talks with team owner Chip Ganassi on Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
10 / 26
IndyCar comes to the 2026 Sonsio Grand Prix at Indianapolis Motor Speedway
Arrow McLaren driver Pato O’Ward (5) prepares to get in his car Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
11 / 26
IndyCar comes to the 2026 Sonsio Grand Prix at Indianapolis Motor Speedway
Team Penske driver David Malukas (12) stands on the grid Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
12 / 26
IndyCar comes to the 2026 Sonsio Grand Prix at Indianapolis Motor Speedway
A.J. Foyt Enterprises driver Santino Ferrucci (14) talks on the grid Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
13 / 26
IndyCar comes to the 2026 Sonsio Grand Prix at Indianapolis Motor Speedway
Rahal Letterman Lanigan Racing driver Mick Schumacher (47) prepares to get in his car Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
14 / 26
IndyCar comes to the 2026 Sonsio Grand Prix at Indianapolis Motor Speedway
Chip Ganassi Racing driver Alex Palou (10) looks up at the flyover Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
15 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
16 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
17 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
18 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
19 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Crews tend to Chip Ganassi Racing driver Scott Dixon (9) and A.J. Foyt Enterprises driver Caio Collet (4) in the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
20 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
21 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
22 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
23 / 26
IndyCar comes to the 2026 Sonsio Grand Prix at Indianapolis Motor Speedway
A KC-135 Stratotanker flies over the track Saturday, May 9, 2026, ahead of the Sonsio Grand Prix at Indianapolis Motor Speedway.
24 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
25 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Cars spin and collide as they enter the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
26 / 26
Crash photos from 2026 Month of May at Indianapolis Motor Speedway
Crews tend to Chip Ganassi Racing driver Scott Dixon (9) and A.J. Foyt Enterprises driver Caio Collet (4) in the first turn Saturday, May 9, 2026, during the Sonsio Grand Prix at Indianapolis Motor Speedway.
This article originally appeared on Indianapolis Star: Romain Grosjean confronts Marcus Armstrong after IndyCar's Sonsio Grand Prix
