Watch: Sergio Perez’s Red Bull a mangled wreck after spectacular crash at Monaco Grand Prix

Sergio Perez's car smashes into the armco barrier at high speed
Sergio Perez's car smashed into the armco barrier at high speed - Sky Sports F1

Sergio Perez said he was “very surprised” the stewards decided not to sanction Kevin Magnussen following the pair’s spectacular first-lap crash in Monaco, which left his Red Bull car a mangled wreck.

The Mexican, starting 18th after a disastrous qualifying session on Saturday, was left “shaken” but unhurt after the pair collided on the climb up to Beau Rivage, with Haas driver Magnussen trying a move up on the inside.

Perez’s RB20 was spat at high-speed into the armco barrier, with the car eventually coming to a rest some 300 metres down the track. The second Haas of Nico Hulkenberg was also collected as part of the same incident.

Fortunately, all three drivers were able to walk away from their cars – Perez’s was spectacularly damaged with only his car’s survival cell really left intact – as the race was red-flagged to allow marshals to clear the debris.

Opinion was divided on who was to blame for the incident. Sky Sports pundit Martin Brundle felt Magnussen should have backed out of the move. “It was unnecessary from Kevin Magnussen to keep his car there,” he said. “There was a moment when K-Mag should have abandoned that. It was not worth the risk up there. You are fighting at the back against a Red Bull when you are not anywhere near alongside.”

But former world champion Jenson Button said Perez had to take his share of the blame, saying he found it “surprising” that Perez did not move to his left a bit despite knowing Magnussen was there.

Magnussen said later that he had “trusted” Perez would leave him room, arguing that he had a legitimate shot at taking the inside line and that Perez was not leaving him enough space.

But Perez took a dim view of that. “If you see my onboard, at no point do you see Kevin’s car – not even close to me, alongside me, and you could see that the wall is just getting closer and closer,” Perez explained.

“To keep it flat out, there was only one way out of it, and it was either contact with my car or with the barrier.

“There was just simply no room for both cars and at some point, he had to realise that – I mean, I’ve been in that situation – and many times when you are the car behind you just have to realise that it’s time to back off, before things get closer to you.”

Sergio Perez's car is a crumpled wreck
Perez's car was a crumpled wreck - Getty Images/Clive Rose

Perez added that he was “very surprised” the stewards chose not to investigate, given “the amount of damage and how dangerous the damage was”.

Magnussen, who was already on 10 penalty points, would have faced a race ban had he picked up another two.

There was also a big first-lap incident between the Alpines of Esteban Ocon and Pierre Gasly. At Portier, Ocon lunged up the inside of his team-mate’s car, throwing the Frenchman’s vehicle high into the air after their wheels interlocked. Ocon was handed two penalty points on his licence and a five-place grid penalty at his next race. His furious team principal Bruno Famin hinted to Canal+ that that might not be for a while. “We will decide on the consequences,” Famin said. “Portier was not the place to try an attack without leaving room for your team-mate.”