F1 Full Results | Ferrari take 1-2 in Monza FP1

Charles Leclerc's time of 1:23.008 was unbeatable, and followed by teammate Lewis Hamilton in second.

The pair both set their times on medium tyres and were still quicker than this season's constructors' championship leaders, Mercedes, with George Russell in third and Kimi Antonelli fifth - Liam Lawson put his Red Bull in between them.

The session was also red flagged as rookie Colton Herta's Cadillac broke down with a hydraulic issue 20 minutes into the running.

There was also the news of the FIA International Court of Appeal reinstating Pierre Gasly's Monaco Grand Prix penalties, taking him off the podium and putting Isack Hadjar back on.

Of the four rookies to take part, Paul Aron impressed the most, putting his Alpine 10th with the president of Estonia watching on.

However, he did cause some grievances from his colleagues, particularly Yuki Tsunoda over a blocking incident at the final corner.

Another key feature of the session was the new patch of gravel inside the chicane at Turn 1, catching out numerous drivers who overcooked their entry.