F1: Hamilton to start at the back of the grid for Italian Grand Prix

Lewis Hamilton will start the Italian Grand Prix from the back of the grid after taking his fourth engine of the season.

Mercedes have confirmed the seven-time World Champion will take the new power unit following his race-ending crash with Fernando Alonso at the Belgian Grand Prix.

Hamilton and Alonso came together at the opening lap of the race in Spa with the Mercedes car being lifted into the air before heavily crashing to the floor again.

Mercedes had hoped they could salvage the power unit for reuse, especially with a penalty looming, but that proved to be impossible.