Piastri heads Norris in Friday practice in Imola

Emilia-Romagna Grand Prix

Venue: Imola Dates: 16-18 May Race start: 14:00 BST on Sunday

Coverage: Live commentary of all sessions on BBC Radio 5 Sports Extra; live text updates on BBC Sport website and app

Oscar Piastri led Lando Norris to a McLaren one-two in Friday practice at the Emilia-Romagna Grand Prix.

The Australian, leading the world championship from Norris by 16 points after four wins in the first six races, headed Norris in both sessions, and ended the day 0.025 seconds quicker.

Alpine's Pierre Gasly was a surprise third quickest, ahead of the Mercedes of George Russell, Red Bull's Max Verstappen and Ferrari's Charles Leclerc.

Lewis Hamilton, struggling with braking feel, was 11th fastest in the second Ferrari.

Although Ferrari appeared to be struggling for speed over a single qualifying lap, Leclerc and Hamilton both appeared to be mixing it with the McLarens for race pace later in the session.

Verstappen, in a Red Bull that is upgraded for this weekend, was off the pace on the long runs, and slower than Kimi Antonelli's Mercedes.

The race runs were interrupted when Isack Hadjar, seventh fastest overall for Racing Bulls, lost his car on the exit of the Tamburello chicane and spun into the barriers.

The car appeared to have escaped largely undamaged, but Hadjar became stuck in the gravel as he attempted to return to the track and the session was red-flagged.

It did restart, but only in time for some drivers to do a single flying lap.

Behind Hadjar in the list of fastest times, Yuki Tsunoda was eighth fastest in the second Red Bull, ahead of the Williams of Alex Albon and Carlos Sainz.

Lance Stroll, given the responsibility to test Aston Martin's major upgrades, which included a new floor, was down in 17th.

Team-mate Fernando Alonso, in the previous-specification car for a back-to-back comparison, was three places higher and 0.121secs quicker.