Mercedes team-mates Lewis Hamilton and George Russell collided at Turn 1 on the opening lap of the Qatar Grand Prix - putting Hamilton, who will face a stewards investigation, out.
Russell started second on the Medium tyres with Hamilton third on the Softs, and crucially on the racing line.
As the field made the long run down to Turn 1, Hamilton attempted to go around the outside of Russell and pole-sitter Max Verstappen, but the left-front of Russell's car collided with the right-rear of Hamilton.
The tyre was plucked off the rim - with Russell informing the team that he "wasn't even looking behind" while Hamilton simply summed the incident up over the radio as being "taken out by his own team-mate."
After the incident, the Safety Car was deployed, but Hamilton will be investigated for crossing the track on foot by the stewards, something prohibited under the rules.