Sergio Perez and Carlos Sainz were involved in a huge crash during a chaotic end to the Azerbaijan Grand Prix.
Perez qualified ahead of his Red Bull teammate Max Verstappen for the race in Baku, a track where he holds the record for the most wins.
With McLaren's Oscar Piastri holding the race lead and Ferrari's Charles Leclerc's tires showing signs of giving up during the final 10 laps, Perez was pushing to move into second but had Sainz putting pressure behind him.
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After waiting for the perfect moment to strike, Perez eventually made his move on Leclerc but defensive driving from the Monaco-born driver allowed his teammate Sainz to push Perez back down to fourth.
However, on the following straight, both drivers collided and ended up against the wall following the huge collision.
Perez was furious and unleashed a ferocious radio message stating: "What the f*** is he doing, man? What the f***? Is he crazy or what? F****** idiot man"
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Sainz also responded on the radio and seemingly had no idea what went wrong.
The Spaniard said: "What happened there? What happened? I don't get it"
The incident will be investigated the race stewards.
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Following the crash, the race ended up safety car conditions which allowed Piastri to secure another victory with Leclerc finishing in second and Mercedes' George Russell gaining a surprise podium.
McLaren's win means Red Bull have dropped from the top of the Formula One constructor's championship for the first time in two years with Perez failing to score and Max Verstappen struggling to fifth place finish after being overtaken by championship rival Lando Norris.
Verstappen had complained earlier in the race over his radio that the 'car had no bite' and later said 'my brakes are not working' as Red Bull continue to be challenged by their car's design.
Norris also managed to add a point for the fastest lap of the race and cut Verstappen's lead at the top of the drivers championship to 59 points.
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Marcus Banks