Cadillac has lost its maiden Formula 1 points finish in Monaco due to a post-race penalty that hands the Aston Martin-Honda alliance its first point instead.

Perez was 10th in the provisional classification, once Nico Hulkenberg was penalised 10 seconds for a collision with Carlos Sainz, but was summoned to see the stewards after the race over a being out of position at the late-race standing restart.

That proved to be a fairly slam-dunk case, with Perez handed a 10-second time penalty that dropped him from 10th to 15th and last.

The stewards' statement said: "Video evidence showed clearly that the front right wheel of car #11 [Perez] was outside the starting box. The standard penalty is applied."

That was the second such infringement for Perez during the race as he erroneously pulled up into the vacant grid spot left by Gabriel Bortoleto's Audi (which was starting from the pitlane) and earned a drivethrough penalty he served in the race.

Perez and Cadillac's lost first F1 point was Aston Martin and Honda's gain as Perez's penalty promoted Fernando Alonso into 10th place.

Bortoleto moved up to 11th ahead of George Russell, Hulkenberg and Franco Colapinto.