Monza GP2: Red Bull's Pierre Gasly fastest in free practice

Gasly led for the majority of the session with a 1m31.669s time and finished 0.317 seconds ahead of Spa sprint race winner Rossi, who had a big moment when he went through the gravel on the exit of the second Lesmo.

Campos Racing driver Rio Haryanto was a fraction further back in third ahead of championship leader Stoffel Vandoorne.

The McLaren junior struggled early on in the session.

He went straight on at Turn 1 and missed the apex of Turn 2 a few laps later, before putting some clean laps together to break into the top 10.

GP2 veteran Rene Binder, who is filling in for the injured Daniel de Jong at MP Motorsport, was fifth edging out Rapax driver Sergey Sirotkin and Status GP's Richie Stanaway.

Williams F1 development driver Alex Lynn was five tenths off his DAMS team-mate Gasly in eighth after he had an off at the della Roggia chicane.

Campos Racing's Arthur Pic also had several moments down in ninth, ahead of Russian Time's Mitch Evans, who rounded out the top 10.

In his first GP2 outing Nissan LMP1 driver Jann Mardenborough finished more than two seconds off the pace in 25th.

Fellow newcomer Patric Niederhauser didn't fair much better either.

The former GP3 driver finished down in 23rd after stopping at the pitlane exit towards the end of the session, which brought out the yellow flags.

GP2 returnee Simon Trummer also brought out the yellow flags when he ground to a halt on the run to the second Lesmo.

PRACTICE RESULTS: