Antonio Giovinazzi, Nabil Jeffri excluded from Monza GP2 qualifying

The Italian had been narrowly pipped to pole by Prema team-mate and championship leader Pierre Gasly.

But the stewards ruled Giovinazzi's car had "insufficient tyre pressures".

A Prema statement said the pressure discrepancy was minor and that the team had apologised to Giovinazzi.

"The stewards questioned the front left tyre pressure of the #20 car, which was found under the allowed range by 0.1 psi," it read.

"The difference did not impact on the Italian racer's performance but eventually proved crucial for him.

"The Prema team apologises to Giovinazzi and takes full responsibility for the mistake that deprived him of a deserved and valuable second place on tomorrow's starting grid."

Arden driver Nabil Jeffri was judged to have committed the same offence and has also been put to the back, having qualified a GP2 career best eighth.

Giovinazzi's demotion moves Artem Markelov up to the front row alongside Gasly. The Russian's third on the grid was already his best qualifying effort in the series.

REVISED STARTING GRID