By Phil McNultyChief football writer at Emirates Stadium
Liverpool struck twice late on to secure their first league win at Arsenal for 11 years and increase Arsene Wenger's troubles.
Arsenal - featuring Samir Nasri in the line-up with his proposed move to Manchester City on hold - held their own until impressive Emmanuel Frimpong was sent off with 20 minutes left.
Liverpool boss Kenny Dalglish reacted by introducing Luis Suarez and Raul Meireles in what proved to be the decisive move, as the pair were involved in both goals.
They combined before youngster Ignasi Miquel, on for early injury victim Laurent Koscielny, saw a clearance deflect off Aaron Ramsey into his own net after 78 minutes and Suarez applied a simple finish from Meireles's pass in the dying seconds to wrap up Liverpool's first win of the season.
Arsenal applied plenty of effort but look desperately thin on rescources, something Wenger must address urgently, while Dalglish was able to bide his time before bringing on Suarez to make an emphatic impact.
Dalglish was ecstatic at the final whistle, whereas Wenger must now fear his defensive options will be reduced further by Koscielny's back problem ahead of Wednesday's Champions League qualifier against Udinese in Italy.
“Wenger now faces 10 days that may not exactly define his future, but which have the capacity to shape the mood of an entire season”
Nasri received a mixed reception when his name was announced - but swiftly won over his detractors with an energetic and influential performance in the opening period, with 19-year-old Frimpong also impressive.
Arsenal also had to regroup after the early loss of Koscielny with a back spasm. Young Spanish defender Miquel came on and Liverpool almost took advantage of the defensive readjustment as Andy Carroll rose to meet Stewart Downing's cross and produce an athletic save from Wojciech Szczesny.
Szczesny had an easier task to save from Jordan Henderson's header before Arsenal grew in confidence and started to threaten in the latter stages of the half.
Wenger blames "scandalous luck" for defeat
Nasri demonstrated the verve that has made him such a coveted asset with a surging run from inside his own half that ended with him shooting just wide from 20 yards and Frimpong also forced a fine stop from Liverpool keeper Pepe Reina with a low drive.
As a downpour soaked the Emirates, Arsenal almost made the breakthrough after 68 minutes when Andrey Arshavin found Robin van Persie in the area but Reina stuck out a leg to make a vital save.
Wenger rubbed his hands through his rain-soaked hair in sheer frustration, and he was not feeling any better two minutes later when Frimpong marred what had been a performance of real promise with a wild challenge on Lucas that earned him a second yellow card and dismissal.
Graham TaylorBBC Radio 5 live pundit
“It was a big win for Liverpool and will help their confidence. This wasn't the Arsenal first team but there are problems. Arsene Wenger has to come up with some answers - he has to come with signings.”
Dalglish used Liverpool's numerical advantage to make a double substitution, sending on Suarez and Meireles for Carroll and Dirk Kuyt. Wenger's response was to replace Arshavin with Henri Lansbury.
When the deadlock was broken, it came in cruel fashion for Arsenal with 12 minutes left. Miquel, with Suarez in close attendance, attempted to clear only to see his attempt strike Ramsey and loop over the stranded Szczesny.
The energy visibly drained out of Arsenal and Suarez's late second only increased the pain for Wenger and Arsenal's increasingly frustrated fans.
Full Time The final whistle goes and the game is over.
Corner from the left by-line taken by Samir Nasri, clearance made by Daniel Agger.
Aaron Ramsey takes a shot. Charlie Adam gets a block in.
The assist for the goal came from Raul Meireles.
89:57 Goal scored
Goal! - Luis Suarez - Arsenal 0 - 2 Liverpool Luis Suarez finds the back of the net with a goal from deep inside the penalty box low into the middle of the goal. Arsenal 0-2 Liverpool.
Charlie Adam takes the direct free kick.
Booking Henri Lansbury is shown a yellow card.
Henri Lansbury challenges Charlie Adam unfairly and gives away a free kick.
Raul Meireles has shot on goal from just outside the area which goes wide of the right-hand upright.
Centre by Stewart Downing.
The ball is delivered by Martin Kelly, Thomas Vermaelen manages to make a clearance.
Samir Nasri delivers the ball.
Substitution Nicklas Bendtner on for Theo Walcott.
Thomas Vermaelen takes a shot. Save by Jose Reina.
77:13 Goal scored
Goal! - Aaron Ramsey - Arsenal 0 - 1 Liverpool Own goal by Aaron Ramsey. Arsenal 0-1 Liverpool.
Shot from 35 yards by Thomas Vermaelen missed to the left of the net.
Corner taken by Raul Meireles from the right by-line, save by Wojciech Szczesny.
Stewart Downing takes a shot. Wojciech Szczesny makes a save.
Luis Suarez takes a shot. Save by Wojciech Szczesny.
Daniel Agger takes the direct free kick.
Substitution Henri Lansbury on for Andrey Arshavin.
Substitution Raul Meireles comes on in place of Dirk Kuyt.
Substitution Andrew Carroll leaves the field to be replaced by Luis Suarez.
Dismissal Emmanuel Frimpong is sent off by the referee.
Emmanuel Frimpong concedes a free kick for a foul on Leiva Lucas.
Corner from left by-line taken by Samir Nasri.
Robin van Persie takes a shot. Save by Jose Reina.
Theo Walcott sends in a cross, Daniel Agger manages to make a clearance.
Martin Kelly crosses the ball, Bacary Sagna manages to make a clearance.
Robin van Persie delivers the ball, save by Jose Reina.
The ball is sent over by Theo Walcott, clearance made by Jamie Carragher.
Charlie Adam sends in a cross, save by Wojciech Szczesny.
Corner taken left-footed by Stewart Downing from the right by-line, save by Wojciech Szczesny.
The offside flag is raised against Andrew Carroll. Ignasi Miquel takes the direct free kick.
Free kick awarded for a foul by Samir Nasri on Charlie Adam. Jose Reina restarts play with the free kick.
Martin Kelly sends in a cross, Carl Jenkinson manages to make a clearance.
Emmanuel Frimpong concedes a free kick for a foul on Dirk Kuyt. Free kick taken by Daniel Agger.
The assistant referee signals for offside against Andrew Carroll. Ignasi Miquel takes the free kick.
Stewart Downing concedes a free kick for a foul on Emmanuel Frimpong. Free kick taken by Andrey Arshavin.
Effort from inside the box by Martin Kelly hits the post.
Carl Jenkinson delivers the ball, clearance made by Martin Kelly.
Charlie Adam handles the ball and concedes a free kick. Thomas Vermaelen takes the free kick.
The ball is crossed by Bacary Sagna.
Charlie Adam takes a shot. Save by Wojciech Szczesny.
The referee gets the second half started.
45:00 +3:09 Half time
Half Time The first half comes to an end.
Shot from just outside the area by Samir Nasri goes over the bar.
Corner taken right-footed by Samir Nasri from the left by-line, save made by Jose Reina.
Direct effort from the free kick comes in from Robin van Persie, Martin Kelly gets a block in.
Booking Booking for Leiva Lucas for unsporting behaviour.
Foul by Leiva Lucas on Emmanuel Frimpong, free kick awarded.
Robin van Persie takes a shot. Blocked by Jamie Carragher.
Corner taken left-footed by Robin van Persie to the near post, clearance by Andrew Carroll.
Short corner taken by Robin van Persie from the right by-line.
Andrew Carroll takes a shot. Ignasi Miquel gets a block in.
Stewart Downing has an effort at goal from outside the penalty box which goes wide right of the target.
Free kick awarded for a foul by Andrew Carroll on Andrey Arshavin. Andrey Arshavin takes the free kick.
Free kick awarded for a foul by Emmanuel Frimpong on Jordan Henderson. Charlie Adam takes the direct free kick.
Samir Nasri has an effort at goal from just outside the box which goes wide of the left-hand upright.
Dirk Kuyt is flagged offside by the assistant referee. Free kick taken by Wojciech Szczesny.
Inswinging corner taken left-footed by Charlie Adam, clearance by Carl Jenkinson.
Corner taken by Samir Nasri, Jamie Carragher manages to make a clearance.
Emmanuel Frimpong takes a shot. Save by Jose Reina.
Unfair challenge on Bacary Sagna by Martin Kelly results in a free kick. The free kick is delivered right-footed by Andrey Arshavin from left wing, Charlie Adam manages to make a clearance.
Shot on goal by Charlie Adam from long range goes harmlessly over the target.
Centre by Andrey Arshavin.
Wojciech Szczesny takes the free kick.
Booking Andrew Carroll goes into the referee's book.
The assistant referee flags for offside against Andrew Carroll.
Corner taken by Stewart Downing from the right by-line, clearance made by Thomas Vermaelen.
Emmanuel Frimpong challenges Andrew Carroll unfairly and gives away a free kick. Free kick crossed left-footed by Charlie Adam from left channel.
Jordan Henderson takes a shot. Save by Wojciech Szczesny.
Foul by Carl Jenkinson on Sanchez Jose Enrique, free kick awarded. The free kick is swung in left-footed by Charlie Adam, Andrey Arshavin manages to make a clearance.
Effort on goal by Dirk Kuyt from just outside the area goes harmlessly over the target.
Daniel Agger crosses the ball, Andrew Carroll takes a shot. Wojciech Szczesny makes a save. Inswinging corner taken left-footed by Charlie Adam from the right by-line to the near post, clearance made by Emmanuel Frimpong.
Stewart Downing takes a shot. Thomas Vermaelen gets a block in.
The referee blows for offside. Wojciech Szczesny takes the direct free kick.
Substitution Ignasi Miquel on for Laurent Koscielny.
Unfair challenge on Laurent Koscielny by Andrew Carroll results in a free kick. Wojciech Szczesny takes the free kick.
Unfair challenge on Andrew Carroll by Laurent Koscielny results in a free kick. Charlie Adam takes the free kick.
Dirk Kuyt crosses the ball, Laurent Koscielny makes a clearance.
Unfair challenge on Dirk Kuyt by Andrey Arshavin results in a free kick. Charlie Adam delivers the ball from the free kick left-footed from right wing, clearance made by Daniel Agger.
Unfair challenge on Bacary Sagna by Martin Kelly results in a free kick. Wojciech Szczesny restarts play with the free kick.
Booking Emmanuel Frimpong is booked.
Inswinging corner taken by Samir Nasri, Header from deep inside the area by Thomas Vermaelen goes over the bar.
Corner taken by Robin van Persie played to the near post, Martin Kelly manages to make a clearance.
Corner taken by Andrey Arshavin from the left by-line, Martin Kelly makes a clearance.
Free kick awarded for an unfair challenge on Daniel Agger by Emmanuel Frimpong. Charlie Adam delivers the ball from the free kick left-footed from left channel.
Free kick awarded for a foul by Theo Walcott on Sanchez Jose Enrique. Indirect free kick taken by Jose Reina.
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