Max Verstappen lapped with a best time of one minute 27.422 seconds.
Red Bull's Max Verstappen won a rain-delayed and shortened sprint race from pole position at the Belgian Grand Prix on Saturday to stretch his Formula One lead to 118 points.
Australian Piastri, winner of four of the last five races, lapped the Imola circuit with a fastest time of one minute 16.545 seconds on the softest tyre compound with Norris 0.032 slower on a sunny afternoon.
In the constructors' standings, Ferrari closed the gap to McLaren to 24 points.
Factbox on Dutch driver Max Verstappen, who became Formula One's youngest race winner, aged 18, at the Spanish Grand Prix on Sunday.
Max Verstappen claimed his sixth victory from nine races this season and the 60th of his Formula One career.
Red Bull make changes to car after discussions with FIA
The Dutchman's run of nine successive wins was snapped as he broke down on lap four with a brake problem.
Leclerc brought out the red flags when he hit the wall at the second chicane with 45 minutes remaining, causing extensive damage to his Ferrari.
Lewis Hamilton smashed the Shanghai circuit lap record on his way to a stunning first sprint race pole for Ferrari in China on Friday.
Oscar Piastri won the Azerbaijan Grand Prix and sent McLaren top of the constructors' standings in a race that finished with a virtual safety car after a penultimate lap collision between Ferrari's Carlos Sainz and Red Bull's Sergio Perez.
Max Verstappen won Formula One's first Chinese Grand Prix in five years on Sunday.
McLaren's Lando Norris took a commanding Dutch Grand Prix victory on Sunday.
Aston Martin's Lance Stroll collected a one-place grid drop for Sunday's race after stewards ruled the Canadian was to blame for the collision with Leclerc running into him at the hairpin.
World champion Max Verstappen took pole position for the Japanese Grand Prix on Saturday, stunning the McLarens with a late flying lap.
Lando Norris put Formula One champions McLaren on pole position for the Monaco Grand Prix in track-record time on Saturday, with Ferrari's Charles Leclerc alongside on the front row for his home race.
Formula One will have a record 24 races in the season that starts in Bahrain on Saturday.
RB driver Liam Lawson apologised to Sergio Perez after the pair clashed at the Mexican Grand Prix but the New Zealand rookie said he would not change his aggressive approach to Formula One racing.
Max Verstappen clinched his second win of the season as the Australian Grand Prix was halted with three red flags.
McLaren's Lando Norris hailed the best qualifying lap of his career after beating F1 leader Max Verstappen to pole position at the US Grand Prix.
McLaren's Lando Norris dominated the Singapore Grand Prix from start to finish on Sunday to take another chunk out of Max Verstappen's Formula One championship lead.
Max Verstappen held off a late charge by McLaren's Lando Norris to win the Emilia Romagna Grand Prix
Leclerc was 11 seconds clear with seven laps to go and 8.3 ahead with five remaining as the massed ranks of 'tifosi' willed him on.
McLaren's Formula One leader Lando Norris called himself an idiot after crashing in Saudi Arabian Grand Prix qualifying on Saturday, and he stuck by the self-criticism when talking to reporters afterwards.
Four times Formula One world champion Max Verstappen and partner Kelly Piquet announced the birth of daughter Lily on Friday.
Max Verstappen took his fifth pole position in a row at the British Grand Prix.
Formula One may have to wait a decade for a return to screaming V10 or V8 engines and jettisoning the next generation V6 due to be introduced next year is simply not feasible, according to F1's former chief technical officer Pat Symonds.
Red Bull's Max Verstappen dealt Lando Norris a shattering blow in their Formula One title battle by winning a wet and chaotic Sao Paulo Grand Prix from 17th on the grid.
Red Bull's triple world champion Max Verstappen followed up a Saturday sprint win with a statement pole position for Sunday's Austrian Grand Prix, with McLaren's Lando Norris again alongside on the front row.
Born in Paris to Algerian scientist parents and competing with a French licence, the Racing Bulls driver stands out at the top level of the sport for his North African heritage as well as results.
Lando Norris won the Austrian Grand Prix and revived his Formula One title bid after fending off championship-leading McLaren team mate Oscar Piastri under race-long pressure on Sunday.
Mercedes' George Russell celebrated a surprise Austrian Grand Prix win on Sunday after Red Bull's triple world champion Max Verstappen and McLaren's Lando Norris collided late in the race
The win was a first for Ferrari in Mexico since 1990 and fourth of Carlos Sainz's career.
World champion Max Verstappen got back to winning ways on Sunday with a third straight pole-to-flag victory at the Japanese Formula One Grand Prix, leading teammate Sergio Perez across the line for a Red Bull 1-2 at Suzuka.
Statistics for Sunday's season-ending Abu Dhabi Formula One Grand Prix at the Yas Marina circuit.
Verstappen took pole position for the Saudi Arabian Formula One Grand Prix on Friday with Ferrari's Charles Leclerc qualifying alongside on the front row.
Formula One will have two races in Spain next season with Madrid's new street circuit making its debut in September and Italy's Imola dropping off the 24-round calendar, F1 and the governing FIA announced on Tuesday.
Verstappen, who had started alongside Norris on the front row, was leading by lap three and could then build a buffer and take control.
George Russell said he was driving better than ever and ready to fight for a Formula One championship with Mercedes after taking the team's first win of the season in Canada, but this year still looks a long shot.
McLaren's Australian Daniel Ricciardo will join the Dutch 23-year-old on the front row for the first time since the pair were team mates at Red Bull in 2018.