Max Verstappen took his first win as a triple Formula One world champion after dominating a Qatar Grand Prix peppered with pitstops and penalties for a rash of track limit violations.
New Zealander Liam Lawson finished 17th in what is expected to be his last race of the season for AlphaTauri.
Lawson, who started 18th on the grid, struggled for competitive speed, with his team-mate Yuki Tsunoda 15th.
The injured Daniel Ricciardo is expected to return to AlphaTauri for the next round in Texas in a fortnight.
The victory from pole position under the Lusail floodlights was Verstappen's 14th in 17 races, and career 49th, for the 26-year-old Red Bull driver who clinched his third successive title in yesterday's sprint race.
Australian rookie Oscar Piastri, winner of that 19-lap sprint, finished second with McLaren team mate Lando Norris third in what became a three-stop race after Pirelli warned of the risk of blowouts.
"It was a bit close for comfort I think in that last stint. But pace was OK. Another win, unbelievable," said Verstappen, who finished 4.8 seconds clear of Piastri.
The relatively slim gap flattered the Australian, with Verstappen never looking like he was under any pressure and also setting fastest lap.
"That was a proper quality drive," team boss Christian Horner told his champion over the radio.
There was drama even before the cars had lined up on the grid when Ferrari's Carlos Sainz, who ended Red Bull's 100% win record with victory in Singapore last month, was ruled out by a fuel system problem.
It continued seconds after the start when Mercedes team mates George Russell and Lewis Hamilton collided at the first corner, with the latter accusing the younger Briton of taking him out.
Hamilton later calmed down and said he did not consider his team mate at fault.
Russell, who had started second and made four pitstops in all, ended up fourth with Ferrari's Charles Leclerc fifth and Aston Martin's Fernando Alonso sixth.
Esteban Ocon was seventh for Alpine with the Alfa Romeo pair of Valtteri Bottas and Guanyu Zhou eighth and ninth and Red Bull's Sergio Perez demoted to 10th after a five-second post-race penalty for exceeding track limits multiple times.
Verstappen, now 209 points clear of Perez at the top of the standings, led cleanly from pole position and raced away unchallenged.
The sweltering desert heat, even after dark, made it a gruelling race.
"I think what made the race was my first stint. After that I could just manage my pace and make sure that the tyres were always in a good window," Verstappen said.
"The McLarens were quick again today. I had to push for it. It was definitely a tough race out there."
Four drivers collected time penalties for repeated track limits violations -- Perez, Aston Martin's Lance Stroll, Alpine's Pierre Gasly and Williams' Alex Albon.
Stroll, Gasly and Albon were twice penalised for a total of 10 seconds each.
-Reuters