Lando Norris has taken responsibility for his crash with McLaren team-mate Oscar Piastri at the Canadian Grand Prix, saying he made a "fool" of himself.
In the final laps, Norris had overtaken Piastri with a brilliant move, yet after a couple of tightly contested corners, the Brit went for a gap that was not there and clipped his team-mate's back wing before slamming into the barrier.
Norris then crashed out of the race, while Piastri managed to cross the line in fourth, unable to prevent Mercedes from claiming two spots on the podium.
George Russell won the race ahead of Max Verstappen, holding onto his title after Red Bull's protest about a rules breach against him was rejected, while Kimi Antonelli finished third.
The collision between the two McLarens was the first incident during their title duel this year, something the team described earlier in the season as inevitable, but Norris was apologetic post-race.
"No one to blame but myself, so I apologise to the whole team and to Oscar as well for attempting something probably a bit too silly," he told Sky Sports F1.
"Glad I didn't ruin his race. In the end, apologies to the team."
"This was just more silly. This wasn't even like a 'that's racing', it was just silly from my part."
And speaking to the media later on, he added: "Rule number one is not to make contact with your team-mate, and that's what I did.
"McLaren is my family, and I race for them every single weekend and try and do well for them on and off the track. So, when I let them down like this and make a fool of myself like I did today, I have a lot of regret."
Piastri remains top of the drivers' standings, now holding a 22-point lead over Norris, who is still 21 points above Verstappen.
The Australian had finished on the podium in each of the last eight races, but was unable to stretch that to nine on Sunday.
"Obviously, it's not ideal for anyone, but I haven't actually seen the incident, so I don't know what exactly happened," Piastri told Sky Sports F1.
"But if Lando has taken full responsibility, then that's how it goes, I guess. Just a bit of a tricky race in general, and not an ideal finish.
"I thought it was [a fair battle between them]. He made quite a large move into Turn 10, held my own into the chicane, and it was definitely a tough battle, but a clean one up until that point.
"Again, I've not seen the incident, but I don't think there were any bad intentions involved. I think it was just unfortunate, really. I'll go and have a look, obviously, but we're both fighting for a world championship and am very thankful to the team that they allow us to race.
"I don't expect this to change anything in terms of that. We'll keep going racing through the year."
McLaren also remain top of the constructors' championship, despite not being able to assert their usual dominance in Montreal, though Mercedes have leapfrogged Ferrari to close the gap slightly.
"We never want to see a McLaren involved in an accident, and definitely we never want to see the two McLarens touching each other," McLaren team principal Andrea Stella told Sky Sports F1.
"It's something we definitely need to review because this is a very clear principle. At the same time, it's a contact that happened because of a misjudgement. Just Lando misjudged the distance to the car ahead, and therefore, there was no malintent.
"Lando owned immediately, took responsibility for that, but certainly something to discuss and review. Our principles are already in place, our drivers will have something to learn further, and we go racing again.
"It is absolutely a misjudgement that cost Lando quite a lot in the championship. It already cost for the team, so definitely an incident that should have not happened."
