Oscar Piastri was left lamenting his McLaren team "looked like idiots" after their tactical decision on tyres backfired in the Canadian Grand Prix.
The Australian driver could only finish 11th as Mercedes young gun Kimi Antonelli claimed a fourth straight grand prix victory in Montreal on Sunday.
A day after clashing with George Russell in a heated sprint race, Antonelli fought a tense duel with his Mercedes teammate for 30 laps before Russell dropped out with engine failure.