Mercedes to use upgraded engines at Monza

Mercedes will debut an upgraded power unit for the Italian Grand Prix weekend after opting to use all of their remaining seven engine development tokens ahead of Monza.

Title contenders Lewis Hamilton and Nico Rosberg will therefore thus use third power units of the season in Italy this weekend.

Mercedes are not revealing many details about the upgrade but have admitted it is a "tactical decision which have implications for the 2016 season, while enabling the use of a new fuel from Petronas.

Williams, Force India and Lotus will not be receiving the upgrades.