Lewis Hamilton has been confirmed the winner of the Italian Grand Prix after stewards decided not hand a penalty against Mercedes for using incorrect tyre pressures in the race.

The championship leader dominated the Monza race from pole position, but his win was put under immediate investigation when it was revealed he and team-mate Nico Rosberg - who retired with two laps remaining - had lower-than-permitted tyre pressures on the grid.

A subsequent stewards' hearing, however, determined that the tyre pressures were in fact correct when the tyres were originally fitted and that Mercedes followed correct procedure thereafter.

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"Having heard from the Technical Delegate, the Team Representatives and Pirelli Team Tyre engineer, the stewards have determined that the pressure in the tyres concerned were t the minimum start pressure recommended by Pirelli when they were fitted to the car.

"In making this determination regarding the pressures, the stewards noted that the tyre warming blankets had been disconnected from their power source, as is normal procedure, and the tyres were significantly below the maximum tyre blanket temperature at the time of the FIA's measurement on the grid, and significantly different temperatures from other cars measured on the grid. Further, the stewards are satisfied that the team followed the currently specific procedure supervised by the tyre manufacturer for the safe operation of the tyres.

"Therefore, the stewards decide to take no further action.

"Nevertheless, the stewards recommend that the tyre manufacturer and the FIA hold further meetings to prove clear guidance to the teams on the measurement protocols."

The outcome is a huge boost to Hamilton's title hopes as it means he keeps his maximum points' haul, confirming his 53 point lead in the overall standings over Nico Rosberg, who retired with two laps remaining.