Last Updated: 29/01/14 9:49pm
Hazard again but Adrian gets down and clings on with Ba waiting to pounce. Is that Chelsea's last chance?
Ba hits the post from close range - then Hazard jinks his way into the area but his effort is too high.
Jose Mourinho is furious - but O'Brien looks genuinely hurt here and heads off for further treatment. Taylor drops into the back three - and is straight into the fray.
O'Brien goes down with a shoulder injury in the West Ham area but play goes on. He receives lengthy treatment after a tangle with Cahill.
Chelsea lining up pot-shots but it's Matic who sees his effort deflected behind for a tenth corner which is defended well.
Lampard looks certain to score but again Taylor throws himself in the way to deny the former West Ham midfielder.
Ramires eases Downing off the ball and concedes a free-kick. Downing himself takes but Tomkins fouls Terry.
O'Brien centres but Chelsea break clear with Willian. He finds Ivanovic - now at left back - but the defender's cross floats well over.
Air shot from Carroll as he's found by Downing's floated cross. What an opportunity for the visitors. The big striker will be kicking himself.
Willian chopped down by O'Brien who plays advantage then returns to book the Hammers defender. Nasty challenge from behind.
Is it time for a Chelsea change? They need someone to break beyond the massed ranks of the Hammers defence.
Oscar again but Tomkins stands firm. The ball comes back to the Brazilian but Adrian gets everything behind it.
Carroll goes down in a heap after tangling with Terry. The West Ham striker claims he got a hand in the face.
Decent opening for Hazard after patient approach play but the Belgian clips his shot well wide. Disappointing.
Oscar threads the ball through for Ramires but Tomkins stands firm to block at the expense of a ninth corner. Cahill gets his head to it but his effort is well over the bar.
West Ham get the second half underway and are swiftly on the attack but Cech takes Jarvis' centre easily.
The teams are back out as the rain continues to pound down at Stamford Bridge. Can Chelsea find a breakthrough or will West Ham earn a precious 'bonus' point in their bid to pull away from the drop zone?
If you fancy a West Ham win Sky Bet are offering 10/1 while it's 3-1 for Chelsea to find a breakthrough. The draw is available at 11/4.
That's the interval. Great effort so far from the Hammers who will be indebted to their Spanish keeper Adrian for keeping it goalless at the break.
We're into first half stoppage time now as Ivanovic forces another corner. Terry can't get on the end of it this time as Downing brings it clear.
Demel scrambles the ball away for a corner with Eto'o just looking to pounce. Willian takes as the pushing and shoving in the Hammers' box intensifies. Carroll is first to the ball to clear the visitors' lines.
Long punt from Cech finds Hazard. Good trickery by Eto'o forces a corner off Tomkins which Willian takes. Terry gets a header in which is blocked by Adrian's right boot. good reaction by the Spaniard.
Good defending again by the visitors as Hazard looks to find a way through. The ball breaks back to him but his curler is straight at Adrian.
Corner conceded needlessly by Cahill. Downing delivers but it's a poor centre. What a wasted opportunity.
Chelsea's build-up play has been a bit ponderous so far allowing the Hammers to get bodies behind the ball. The visitors have been given a pretty comfortable ride so far.
Oscar strikes one but it drifts wide of Adrian's right-hand post. Decent effort by the little Brazilian.
Looks like Diame may have to come off. He appears to be struggling with a twisted ankle. Matt Jarvis is coming on for him.
Noble catches one straight in the midriff. He needs a minute to catch his breath. Diame is still struggling after his encounter with the advertising boards.
Diame misses his kick but goes crashing over the advertising hoardings. He looks somewhat battered and bruised but is back in the fray.
Ramires tries his luck from distance but it flies over the angle of post and crossbar. Decent strike though.
The corner comes to nothing but Chelsea are soon back on the attack with Oscar who tees up Mikel but his effort is harmless.
Ramires caught by Diame's trailing leg. Willian takes the free-kick but it's flicked behind by O'Brien for a corner.
Oscar finds space but Collins concedes the corner. The ball reaches Ramires but his centre is too deep and sails harmlessly behind.
Good direct attack by Chelsea as Ivanovic finds Hazard but Eto'o is unable to keep his effort down under challenge by Tomkins.
This has been a super start by the visitors. Sam Allardyce will be delighted with the efforts of his team so far.
Free-kick conceded by Cahill who wrestles Diame to the ground. Downing takes and finds the head of Tomkins but Cech is able to dive to his right and turn the ball around the post off Noble.
Great save by Adrian to deny Oscar's curler. That was heading for the top corner. Superb stretch by the Hammers keeper to deny the Brazilian.
The Hammers are looking pretty comfortable at the moment and are containing their hosts. Diame advances but goes down. Nothing doing says referee Neil Swarbrick.
Carroll goes down under a challenge from Azpilicueta just six yards from goal. Strong shout for a Hammers penalty. There was definitely contact. Lucky escape for the Blues.
Carroll drops deep to receive the ball and Demel looks to advance but Willian is back to cover any danger.
Azpilicueta charges forward and looks to cross but it's blocked for a corner which comes to nothing. Poor delivery by Willian.
O'Brien's throw is flicked on by Carroll and is cleared by Cahill - but at the expense of a Hammers corner which is nodded away by Oscar.
Jose Mourinho still to lose a Premier League game at Stamford Bridge. What chance that record will end tonight? Oscar gets us underway.
It's pouring down at Stamford Bridge as we get closer to kick-off. Still awaiting the arrival of the teams.
So what can we expect of West Ham recruits Antonio Nocerino and Marco Borriello who are named on the substitutes' bench tonight? Can they find the goals to fire the Hammers to safety?
Not much love for the Hammers so far but Dave says: 'How about 2-1 to the Hammers? Penalty and Carroll on the scoresheet.'
Paul says: 'Massive few weeks for Chelsea coming up. Need to take advantage of Arsenal's draw and get the first of 4 games that could define our season off to a winning start. 2-0 Chelsea.'
@JunaydYNWA has been in touch on Twitter and says: 'I'm a Liverpool fan here and I reckon West Ham can nick a point off Chelsea. I'm going with 1-1 - Carroll and Eto'o to score.'
Will from Colchester says: 'Should be a comfortable night for the Blues. Going for 3-0 with Hazard on the scoresheet twice as well as a classic header from Gary Cahill.'
Half an hour until kick-off. If you've any thoughts on the team line-ups or want to make a pre-match prediction you can get in touch via email - email@example.com - or tweet me - @skysportswebed. I'll look to include as many as I can ahead of kick-off.
Dheeraj says: 'Predicting a 3-0 with Hazard, Oscar and Ramires all scoring, a thumping win should set for the big game next Monday when we go to Man City!'
West Ham: Adrian, Demel, Tomkins, Collins, O'Brien, Noble, Taylor, Nolan (c), Downing, Diame, Carroll. Subs: Jaaskelainen, McCartney, Jarvis, Nocerino, Morrison, C.Cole, Borriello
Chelsea: Cech; Ivanovic, Cahill, Terry (c), Azpilicueta; Ramires, Mikel; Willian, Oscar, Hazard; Eto'o. subs: Schwarzer, Cole, David Luiz, Matic, Lampard, Schurrle, Ba.
John Terry has been speaking about his former teammate Juan Mata in the match programme and is wishing the Spaniard well at Old Trafford. Terry said: 'We were all sad to see Juan leave at the end of last week. It has been a pleasure to play alongside him and he is one of the nicest guys you could meet but, even though he is a huge talent, we as a club owed him to let him go and play football. So good luck, mate - we all love you.'
More predictions from Keith who says: 'Tonight's game could be a banana skin for the blues, our confidence maybe high but not let the boys get carried away with this one. If the Hammers play their new signings who knows what could happen. I'm looking for and hoping the Blues win 3-0.'
No surprise that Sky Bet make Chelsea strong favourites to win tonight. They are 1/6 to beat their London rivals while you can get 14/1 on a West Ham victory. The draw is priced at 13/2.
First comments coming in and Joe from Ilford says: 'I think Chelsea have a comfortable win over the Hammers, winning 4-0 with Lampard getting 2 and Hazard and Ocar getting a goal each.'
Petr Cech has also been speaking to Sky Sports and said: 'We know Arsenal dropped two points yesterday and we want to take advantage. Next game we play is Man City and we want to be in a good position for that match.'
Stewart Downing has been speaking to Sky Sports ahead of the game and is confident the Hammers can get a result - if they put away the sort of chances they were creating earlier in the season.
The Chelsea players have just arrived at Stamford Bridge. We should get team news in half an hour or so.
Welcome to our live coverage of Chelsea's clash with West Ham. I'll bring you details of the teams as soon as I have them. In the mean time if you've any thoughts on the game or would like to make a pre-match prediction you can get in touch via email - firstname.lastname@example.org - or tweet me - @skysportswebed. I'll look to include as many as I can ahead of kick-off.