Fernando Alonso will start the Spanish Grand Prix from the back of the grid after incurring a penalty for using his fourth power unit of the season.

Alonso qualified 17th for his home grand prix, blaming a "misunderstanding" in Q1 for his disappointing performance.

The Alpine driver, whose 2022 season has been defined by misfortune, suffered more bad luck ahead of the race.

Alpine changed the engine in Alonso's car, meaning he is now on his fourth different power unit at just the sixth race of the campaign.

That is one more than is permitted by the regulations, with the penalty sending him to 20th on the grid.

Two-time world champion Alonso has taken only two points from the first five races, suffering retirements in Saudi Arabia and at the Emilia Romagna Grand Prix.

His team-mate Esteban Ocon, by contrast, has 24 points to his name.