Full-time - 90'
3 - 1
12:45 +00:00, December 1, 2012
Upton Park, England
West Ham move to within three points of Chelsea. And the Blues have now not won for seven Premier League games - their worst run for 18 years. That's it, remember you can follow me on Twitter @dalejohnsonESPN
Chelsea went missing after the break, no answer to the increased tempo from the home side - and the visiting fans were far from happy.
West Ham were outstanding in the second half. The performance of Diame was out of the top drawer - which does make you ask why he didn't start.
And that's it! What a comeback from the Hammers! They beat Chelsea 3-1!
Upton Park is bouncing, bubbles floating around the air. There's going to be an East End knees up tonight!
The cross from the right finds Torres completely unamrked five yards out - and he heads straight at Jasskelainen.
Ashley Cole is caught in possession, Maiga feeds in Taylor put he saw his shot saved by Cech. The loose ball fell back to Maiga who powered the ball home.
GOAL MODIBO MAIGA
Four minutes to be added on.
Now West Ham play it safe and take the corner short to waste time.
Nolan nips in round the back and wins another corner for the home side. The crowd are loving this now.
Nolan takes and puts it straight into the gloves of Cech. Not great play there to gift the ball back to Chelsea like that.
West Ham have their tails up, and Azpilicueta has to put the ball behind for a corner.
A final change for West Ham with that assist the last act from Cole, Maiga comes on.
O'Brien lifts a pass into Cole in the box, he holds it up well before laying off to Diame who fires in low from 15 yards out to give West Ham the lead!
GOAL MOHAMED DIAME
Oscar shoots from the edge of the box, but can only put it over.
Back up the other end and Marin has a weak snap shot which Jasskelainen collects with ease.
...the header is arrowing into the net but Cole gets back superbly to head off the line.
In comes the corner, Reid is completely unmarked on the edge of the six-yard box and must put the Hammers in front...
But Jarvis never looks confident, and Cech stretches out to push his effort behind.
It opens up for West Ham! Noble sends Jarvis through on goal!
Chelsea win successive corners but can't create anything, but the pendulum has swung back to the visitors.
Demel deals with a cross - but only by putting the ball behind for a corner.
Moses is replaced by Marin - who looks to be carrying a bit timber
A shot from Mata on the corner of the box is well blocked.
Chelsea had that short spell after West Ham scored - but other than that have offered little in the second half.
Taylor takes the corner from the left this time, Reid wins the header and it's heading for the corner - but at the pace of a small child running across a playground and Cech collects.
More pressure from West Ham, Taylor tries to get there first with a header but Ramires is brave to block with his head.
And that's Hazard's last action of the game as he makes way for Oscar.
Jaaskelainen throws the ball out - but only to Hazard who tries to lob the keeper early but puts his effort way over.
Mikel is booked for dissent and is now one yellow card from a suspension.
It is now 12 hours since Chelsea's Fernando Torres last scored a Premier League goal.
Diame shoots from 30 yards, and it ends up somewhere near the Olympic Stadium.
Noble takes once more, and once more it fails to beat the near post.
Diame wins another corner, this time off Cahill.
This is breathless. Back up the other then and West Ham win successive corners - eventually Torres heads away at the near post to clear Chelsea's lines.
Mata takes a superb free-kick and it has Jaaskelainen beaten all ends up - but comes back off the post!
Noble brings down Ramires 25 yards from goal.
Now Chelsea attack, Hazard's drive from the edge of the box is well saved by Jaaskelainen - it falls to Torres who should score but his half-hearted effort is blocked.
Cole seemed to be climbing all over Ivanovic there, no foul from ref Atkinson who had given Chelsea everything before.
Azpilicueta gives the ball away, it comes to Jarvis whose cross deflects off the head of Cahill and loop to Cole who heads into the corner.
GOAL CARLTON COLE
Awful cross from Noble on the right, straight out of play.
A breather for Chelsea as they win a free-kick over on the right, Mata takes but it's headed away.
West Ham have had 60% of the second half possession to Cheslea's 40%.
Chelsea are defending these set-pieces well, but you do think that if this continues West Ham will get one right.
Another set-piece for West Ham - this time Noble finds the gloves of Cech with a lofted ball from midfield who jumps above everyone.
West Ham come again, neat play from Jarvis and Nolan before a Chelsea defender just cuts off the ball across the six yard box.
Noble takes from the left, Torres heads away at the near post.
Jarvis wins a corner off Azpilicueta. Pressure building.
Fine left-footed cross from Taylor on the right. Nolan's shot is blocked before Cahill accidentally gets kicked in the face by Cole when stooping for the ball. Free-kick.
Collins takes the free-kick, Reid cannot find a team-mate when trying to hook a cross back into the box.
Straight away another free-kick to West Ham after Cole is pushed. Inside the Chelsea half so another chance to deliver.
It's floated in from the left close to Cech, but Nolan is clearly backing into the keeper and is penalised. The pressure is off.
Taylor drills a cross across the box, Nolan almost gets the there but it's still another corner.
It comes to Diame on the edge of the box and his power drive is blocked by Cahill, and eventually it results in another corner.
Cahill concedes a corner. West Ham have started well.
Jarvis chips a cross in for Cole to try a header from just behind the penalty spot - it goes over and needed something special to have brought a goal.
Cole penalised again in the box, this time for a stray hand on Ivanovic.
The offside flag goes up against Fernando Torres just as he seemed ready to run through on goal.
Two changes from West Ham. The ineffectual O'Neil and Tomkins replaced by Taylor and Diame. Much needed.
The second half is under way.
Join me for the second half, and don't forget I'm on Twitter: @dalejohnsonESPN
Chelsea deserve their lead, with West Ham offering nothing until the last minute of the half. But the visitors could be made to pay for not going into the interval more than one goal to the good.
Half-time at Upton Park.
The corner comes in from Noble, and Cech clatters through a team-mate to make sure he gets the ball away after he was to blame for all that pressure.
One minute to be added on.
It's taken short to Collins, whose shot is blocked and the ball eventually comes to Nolan who sees his header well tipped over by Cech.
So, a free-kick to West Ham on the edge of the box. Real chance right on half-time. West Ham's first shot of the match?
Handball outside the area by Cech! He came to try and deal with a bouncing long ball but punched from outside the box. Cahill had it covered too.
Chelsea dominating the possession, 58% to 42%.
Decent save from Jaaskelainen who got back across his box well - but in truth Mata should not have given him the chance to make the save.
Brilliant play by Moses, coming in from the left and bamboozling the Hammers defence. He cuts a pass through the eye of a needle to Mata - Jaaskelained claws it away and the Spaniard's effort on the rebound is blocked.
Juan Mata scored the first goal of Rafa Benitez's tenure at Chelsea
Noble takes but slips on the kick. Chelsea still don't look sure from the set-piece but there's no real danger.
Corner to West Ham, conceded by Ashley Cole.
This is a little better from West Ham as half-time nears.
And then a cross comes in from the right and Nolan fouls Cech. Correct decision this time for sure!
It's fair to say referee Atkinson has been quick to penalise West Ham in the Chelsea box. Considering some of the things you see in the penalty area that was nothing.
Jarvis crossed in from the left, and Collins nods across for Nolan who finds the net acrobatically. Collins is penalised for climbing on Ivanovic. Very, very harsh decision.
It's worked back to Hazard just inside the area, who cuts inside before firing just over the bar. Decent attempt.
Mata takes from the left, Collins gets there first at the near post to flick away with his head.
What seemed like a harmless cross from Azpilicueta is headed behind by Demel for a corner, Chelsea's third.
Sam Allardyce has got some serious work to do at half-time, it's like they are the away side.
Chelsea still passing it around well.
Torres does well to get in down the left, his pull-back for Hazard is terrible and gives the Belgian no chance of controlling it.
....Torres takes one touch before firing a shot into the back of the stand. That was worth about 50p rather than £50m.
Now Chelsea can break! It's Ramires again who is able to get into his stride and gets to the edge of the area before squaring across for Torres....
Noble takes and pumps the ball into the heart of the area - there's a bit of panic but Chelsea eventually get it away.
Azpilicueta fells Jarvis on the left flank. Now this could be dangerous.
Hazard takes the corner, but it comes to nothing.
As if on cue, Jarvis gives the ball away and it eventually results in a corner to Chelsea.
It's been a very sluggish performance by West Ham other than a couple of runs by Jarvis.
And as West Ham look to break Demel needlessly gives the ball away. That allows Ramires to burst in the area and find Moses - and he gets his shot all wrong from a similar position to Mata's goal. He should at least have hit the target.
Mata send in an in-swinger with his left foot and only finds the gloves on Jasskelainen.
Free-kick to Chelsea on the right flank. Mata to take.
Chelsea fans in fine voice, though that did include chanting Roberto di Matteo's name in the 16th minute - just three minutes after the goal.
Chelsea enjoying lots of possession now, playing the ball around with more confidence.
West Ham might be behind, but it's not as though Chelsea have dominated.
That is Fernando Torres' first Premier League assist of the season.
Moses slips in Torres, who made a fine run down the right channel. Torres cuts it back to the unmarked Mata 10 yards out who has the simple task of sidefooting home.
GOAL JUAN MATA
Still waiting for a shot of any description in this game.
As if on cue, Torres tries to go on a run through the centre but Noble steals the ball off his toes.
It is now 11 hours since Fernando Torres last scored a Premier League goal.
The ball is lobbed long into the box by Collins, Reid heads back across goal but the whistle has already gone for a foul before Nolan can collect.
Mikel penalised for a tug back on Nolan on the hal-way line.
Jarvis seeing plenty of the ball, but this time Azpilicueta shields it out for a goal kick
Here's our news story on Andy Carroll's injury
Nice play from Jarvis, who wins a corner off Azpilicueta. It comes in from the left and Cech claws away to safety.
Chelsea fans making all the noise early in the game.
Sam Allardyce is slouched back in his seat - he's effectively in bed.
Awful first touch from Torres in midfield, effectively passing the ball directly to O'Neil.
It's taken short before Mikel lobs one in - it's easy for West Ham to deal with.
Moses wins an early corner for Chelsea.
It's West Ham who kick off - bubbles floating through the air, pretty bubbles everywhere.
Out come the teams. Remember you can follow me on Twitter @dalejohnsonESPN
If Fernando Torres failed to score in the first 11 minutes he will have gone 11 hours without a Premier League goal.
There's no Andy Carroll for West Ham, and he could be out for a while with a knee injury. Carlton Cole starts.
So Chelsea are without David Luiz due to suspension, while Daniel Sturridge, John Terry and Frank Lampard remain on the treatment table. Cahill comes back into the starting line-up, and there's also a place this time for the influential Juan Mata.
It's two points from two games under Rafa Bentiez, whose reception at Chelsea has been frosty, to say the least. A win today, though, would go some way in his quest in to in over the supporters. Scoring a goal would be a solid way to start.
Chelsea substitutes: Turnbull, Romeu, Oscar, Ferreira, Marin, Bertrand, Piazon.
West Ham United substitutes: Spiegel, Maiga, Taylor, Diame, Spence, Fanimo Moncur.
In the build-up to today's game, have a read of Phil Lythell's blog on Chelsea seeking the elusive balance between attack and defence.
Chelsea: Cech, Ivanovic, Cahill, Azpilicueta, Cole, Mikel, Ramires, Hazard, Mata, Moses, Torres.
West Ham United: Jaaskelainen, Reid, Collins, Demel, Tomkins, O'Brien, Noble, Nolan, O'Neil, Jarvis, Cole.
Rafael Benitez is still in search of his first victory as Chelsea boss after two goalless draws. Will he end that barren spell at Upton Park? Commentary begins at 12.45 GMT, join @dalejohnsonESPN
John Mikel Obi
West Ham United