Sergio Aguero scored a hat trick as Manchester City cut Liverpool's lead at the top of the Premier League to two points by beating Arsenal 3-1 at the Etihad Stadium.
Aguero struck in the opening minute, restored City's lead before half-time after Laurent Koscielny headed an equaliser and completed his treble early in the second half.
Arsenal were the architects of their own downfall just 48 seconds in, failing to clear and enabling Aymeric Laporte to cross for Aguero, who headed past Bernd Leno from close range.
City were playing at a high tempo and there were appeals for a penalty moments later when Aguero tangled with Shkodran Mustafi, referee Martin Atkinson waving them away.
Laporte thumped in a header from Kevin De Bruyne's free kick only for the offside flag to go up, but Kyle Walker was forced into a last-ditch clearance at the other end as defensive jitters threatened to let Arsenal in.
From the resulting corner, the Londoners were level after 11 minutes as Koscielny escaped his markers to head into the roof of the net.
The goal briefly stunned City, whose early verve deserted them as Arsenal began to see more of the ball.
Nicolas Otamendi's low shot was held by Leno as they tried to increase the pressure, but Arsenal then built a neat break, started by Matteo Guendouzi, which ended when Walker made another timely intervention.
The Londoners came forward again, Sead Kolasinac firing into the side netting, and De Bruyne shot over after the ball had broken back to City off referee Atkinson.
Arsenal's Alex Iwobi crossed from the right but his ball in was just too high for Pierre-Emerick Aubameyang, and then Alexandre Lacazette's through pass towards Aubameyang was cleared by keeper Ederson.
Kolasinac had an effort parried by Ederson before Torreira's thumping shot was blocked as the Gunners threatened once more, with the home side showing signs of nerves.
The defending champions lost the ball in midfield, starting an Arsenal attack that ended with an Aubameyang strike deflected away -- but with half-time approaching, they regained the lead in style.
The goal came when Sterling combined brilliantly with Ilkay Gundogan to deliver a cross that Aguero converted from close range, and it could have been 3-1 moments later when De Bruyne fizzed an effort wide.
Bernardo Silva fired high over as City began the second half on the front foot, and David Silva miscued a cross from a good position on the left as they threatened again.
Leno did well to claim a loose ball inside his six-yard area with home attackers buzzing around, and Mustafi made a good challenge to halt Aguero in the Arsenal area.
Sterling fed De Bruyne inside the area only for him to fire straight at Leno -- but on the hour it was 3-1 when Aguero wrapped his hat trick, bundling home a Sterling cross with Arsenal appealing in vain that he had used an arm.
Soon afterwards, Gundogan was adjudged to have dived and shown a yellow card after going down in the area under a challenge from Mustafi.
The Gunners made a double change, Aaron Ramsey replacing Iwobi and Denis Suarez on for Kolasinac, but were almost 4-1 down when Bernardo Silva's effort was stopped at the near post by Leno.
Aguero had an effort saved by Leno before being replaced by Gabriel Jesus for the final 10 minutes, Leno making another save from Arsenal when he parried a crisp David Silva strike.
City made another late change, Riyad Mahrez on for De Bruyne as they comfortably saw out the remaining minutes.
Source: espn.co.uk