Rarely tested by a Chelsea attack still looking for fluency, and the blame for both of the Blues' goals lay at the feet of Koscielny, not him.
Far too timid when beaten by Torres for Chelsea's opener and further confused his goalkeeper by throwing himself towards Mata's goal-bound free-kick delivery for their second.
Handled the threat of an inconsistent Torres reasonably well and looked comfortable and commanding on the ball.
No longer wears the look of a frightened schoolboy at this level. Acquitted himself well in attack and defence, both with and without the ball.
Carried a real threat going forward and looks to have matured a lot, although his forays forward left him exposed defensively on a couple of occasions.
Shielded his back four as well as could be expected for someone not born to the task, and it is to his credit that Chelsea's goals came from set-pieces rather than open play.
Used the ball unfussily and intelligently until he was replaced by Walcott on 67 minutes.
Passed and probed constantly all over the opposition half, rarely putting a foot wrong as he did so. Another classy display of midfield playmaking.
Worked tirelessly across the front and forced a good save from Cech with a header before being replaced by Giroud with 23 minutes left.
A typical Gervinho performance. Buzzed dangerously around the Chelsea box and took his goal in a manner Thierry Henry would have been proud of, but his efforts attracted as many groans as cheers from the Emirates Stadium crowd.
Could do nothing about Gervinho's brilliantly-taken equaliser, and made a good stop to deny Podolski in the second half.
Unflappable as ever after recent events and in the face of resounding and persistent boos, marshalling his defence extremely well.
A couple of hairy moments aside, he was generally calm and composed alongside Terry, and his covering pace and sharp reading of the game was crucial to his side's defensive effort.
Generally solid, although he was at fault for Gervinho's equaliser, allowing Oxlade-Chamberlain's low cross to worm it's way through his legs.
His usual muscular yet technically-adept presence at right-back, and it is to his credit that most of Arsenal's joy came down the opposite flank.
J. Obi Mikel
Did the unglamorous job very well, and had none of the lapses in concentration which have undermined his recent performances.
Once again showed his energy and tireless running in the midfield and, a couple of ill-advised tackles aside, this was a very impressive display.
The best player on the pitch. He tormented Arsenal in open play and his pinpoint set-pieces won his side the match. Once again, quite simply, he was the difference.
Booked for a silly foul early on, he redeemed himself by showing glimpses of his class on the ball and working very, very hard off it.
Drifted dangerously around the final third and, although he did not add to his assist tally, his mere presence was often enough to unsettle defenders and make space for his team-mates.
This was not the glorious Torres so often seen at Anfield, nor was it the limp and desolate Torres witnessed so often by Chelsea fans. It was somewhere in between but, as long as he scores more goals in big matches like this one, the doubters cannot talk too loudly.
Looked lively and a willing runner for the majority of the afternoon after Diaby's early withdrawal, but the shooting ability which Arsene Wenger praised so highly in his matchday programme notes was nowhere to be seen.
Replaced Podolski with just over 20 minutes remaining but provided little more in the way of cutting edge.
Brought on with 67 minutes gone on the right flank - was his manager making a point, perhaps? - he could not find the finishing product to go with his searing pace.
Linked up well with Hazard down the left and provided more protection for Cole on his introduction.
Came on to replace the booked David Luiz and helped his side withstand a late Arsenal onslaught.
A more direct presence going forward, he added width and strength to his side's attack.