Toro Rosso Formula 1 team principal Franz Tost was frustrated with Sergio Perez’s driving to collide with Daniil Kvyat and force the Russian out of the Monaco Grand Prix.
Running on fresh ultra-soft tyres, Perez attempted to pass Kvyat at Rascasse for ninth place with six laps to go, but the duo made contact.
Kvyat retired after the impact, calling it “completely desperate”, while Perez continued and ultimately finished 13th.
Stewards investigated the incident and handed Perez a time penalty, which didn’t affect his position, and penalty points on the Force India driver’s licence.
Tost was dismayed with Perez’s approach as the incident robbed Toro Rosso of a double-points finish, with Carlos Sainz Jr finishing sixth.
“It was Checo’s fault,” Tost told Autosport. “You don’t just drive in there like that.
“Just look at what is destroyed – the middle of the sidepod [on Kvyat’s car], the left-front wheel [on Perez’s].
“You do not need to discuss the fault – it’s 100% Checo’s fault. You don’t do this.
“Until this incident, we were with both cars in the points.
“All weekend, we had a very competitive car and Carlos showed a fantastic race, defending his sixth position, bringing it home.
“Daniil was there, too, but Perez took him out of the race.”