Monaco authorities have agreed to close the Grand Prix circuit to all traffic and pedestrians from 0645 to 0900.
The final phase of qualifying was halted, with only Piastri and Haas' Nico Hulkenberg having set times, when Sainz slammed backwards into the barriers at the final corner as he prepared to start his flying lap.
Formula One is due to go through a major technical overhaul next season, with wider wheels and chassis, and a more aggressive look with revised aerodynamics aimed at making the cars faster and harder to drive.
Lewis Hamilton put no limits on what he could achieve after roaring past retired Ferrari great Michael Schumacher on Sunday as the Formula One driver with most wins in the history of the sport.
British ace racer Lewis Hamilton has said that he expects to be at Mercedes for years to come after he was crowned world champion on Sunday for the second time.
Red Bull's Max Verstappen will be doing all he can to stop six-times world champion Lewis Hamilton completing a Mercedes hat-trick and matching another of Michael Schumacher's Formula One records in Hungary this weekend.
Valtteri Bottas took pole position for Formula One's 70th Anniversary Grand Prix ahead of championship-leading Mercedes team mate Lewis Hamilton on Saturday.
Formula One world champion Lewis Hamilton won the Canadian Grand Prix on Sunday in a Mercedes one-two with title rival Nico Rosberg.
Hamilton held on for fourth, but slipped from 18 to 32 points behind Verstappen in the championship standings.
Nico Rosberg was handed a much-needed break in the Formula One title battle which he duly converted by winning Sunday's Belgian Grand Prix, but victory could have tasted much sweeter for the German. Rosberg went into the weekend knowing this was his race to lose. Mercedes team mate and title rival Lewis Hamilton was set to start at the back of the field after taking a planned series of engine-related grid penalties.
Mick Schumacher, son of seven times world champion Michael, made his Formula One test debut with Ferrari on Tuesday at the Bahrain circuit, where 15 years ago his father won the first Grand Prix in the Middle East.
Given how well Hamilton drove last weekend to win the Styrian GP in Austria, few would bet against the British driver securing an eighth success
Mercedes however, were fined 25,000 euros for incorrectly declaring that Hamilton was in compliance with the jewellery ban in a self-scrutineering form.
Formula One got back on track in changed circumstances on Friday but with Mercedes bringing a familiar look to the timing sheets as six times World champion Lewis Hamilton led team mate Valtteri Bottas one-two in Austrian Grand Prix free practice. The Briton did 41 laps and lapped with a best time of one minute 04.816 seconds in a damp and overcast session, 0.356 faster than the Finn.
'I could never have dreamed of being where I am today.'
'I don't feel like I'm at the end. The next eight months or so I'll find out whether I'm ready to stop or not, I don't think I will personally, but you never know.'
The most successful current racer, in terms of wins if not titles, Hamilton can also equal seven-times world champion Michael Schumacher's all-time record of 68 pole positions at Spa on Saturday.
Mick Schumacher made his first track appearance as a fully signed-up Formula One driver on Friday
Formula One championship leader Nico Rosberg has apologised for colliding with team mate Lewis Hamilton during Sunday's Belgian Grand Prix and has been disciplined, his Mercedes team said on Friday.
The Saudi Arabian Grand Prix is the penultimate race on this year's Formula One calendar
The 41-year-old double world champion, enjoying a renaissance with his much-improved team, finished third in Jeddah but was demoted to fourth by a 10-second post-race penalty.
The pole, Vettel's 47th, ended a run of 18 in a row for world champions Mercedes who had Valtteri Bottas and Lewis Hamilton right behind the two red cars in third and fourth places.
Nico Rosberg crossed the line a mammoth 37.7 seconds ahead of German compatriot Sebastian Vettel, who recovered after colliding with his Ferrari team mate Kimi Raikkonen at the first corner, to claim his third win from three races this season.
Lewis Hamilton had his first taste on Friday of the Mercedes car that he hopes will make him Britain's first four-times Formula One world champion this season.
Red Bull's Verstappen, who had been on pole at Zandvoort every year since the circuit returned in 2021 and has yet to be beaten there, will still line up alongside the Briton on the front row.
Seven-times world champion Lewis Hamilton won the inaugural Qatar Grand Prix for Mercedes on Sunday to cut Max Verstappen's overall Formula One lead to eight points with two races remaining.
Red Bull's Max Verstappen won the rain-hit Belgian Grand Prix on Sunday without racing even a single lap as half-points were awarded for only the sixth time in Formula One history.
Felipe Massa was leading the 2008 Singapore Grand Prix when fellow-Brazilian Nelson Piquet Jr. deliberately crashed his Renault into the wall on lap 14.
Verstappen took a grid penalty at the previous race in Russia and finished second after starting at the back of the field, his progress helped after late rain caused problems for others.
Silverstone can provide the antidote to Austria for Lewis Hamilton this weekend, with a record sixth British Grand Prix win -- and his fifth in a row -- there for the taking.
Nico Rosberg had his Formula One world championship lead over Mercedes teammate Lewis Hamilton cut to one point after the German was demoted from second to third place in the British Grand Prix on Sunday.
Ferrari carry burden of history and expectation as they unveil 2022 car.
Verstappen suffered two retirements from the first three races but has otherwise finished all but two rounds in the top three.
Triple Formula One world champion Lewis Hamilton smashed the Bahrain circuit lap record on Saturday to take pole position ahead of Mercedes team mate Nico Rosberg for Sunday's grand prix. The Briton's best lap of one minute 29.493 seconds was the fastest ever at the Sakhir track. Ferrari's Sebastian Vettel and Kimi Raikkonen qualified third and fourth for the second race of the season.
Mercedes can hardly wait for Sunday's Abu Dhabi Formula One title decider to be over so they can tie Lewis Hamilton down to a long-term contract.
Ferrari's Sebastian Vettel, winner of 52 races, has gone more than a year since he tasted victory at last year's Belgian race.
The Mercedes driver smashed the Monza track record with a sensational lap of one minute 18.887 seconds to lead team mate Valtteri Bottas in another front row lockout.
Hamilton said he had not been feeling well on Thursday and Friday, when he was also up until midnight working with his engineers.
Red Bull's Max Verstappen sang "Viva Las Vegas" after racing to a record-extending 18th victory of the season and joining Sebastian Vettel in third place on Formula One's all-time winners' list.
Formula One photographer Mark Sutton had reported seeing the German getting into the passenger seat of Szafnauer's Ferrari after the race at Silverstone, but was unable to take pictures.