Last Updated: 06/04/14 7:39pm
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Two penalties from Steven Gerrard send Liverpool back to the summit, but referee Anthony Taylor is bound to be the focus of attention after his key decisions on West Ham's equaliser and Liverpool's winner.
Armero attempts to swing a cross into the box, only for the ball to strike the arm of Henderson outside the area. West Ham want a free-kick, but Taylor waves play on.
Good save from Adrian! The West Ham goalkeeper has to plunge to his right to keep out a stinging drive from Sterling from the edge of the box. Liverpool have a corner, which they are in no rush to take.
Close to a third for Liverpool!! Great play from Sterling to burst away in midfield and then release Suarez. The striker takes the shot first time, but Adrian sticks out a leg to save.
OFF THE BAR!!! Suarez hits the frame of the goal once again, curling an audacious first-time effort over Adrian only to see it bounce back into play.
Another chance for Sturridge from range. He gets his shot on target this time after being found in space on the left, but it is straight at Adrian.
West Ham just cannot get hold of the ball and are rarely getting out of their own half at present. We're into the last 10 minutes here.
The pattern of the game hasn't changed since the goal. Liverpool are still seeing all of the ball and keep pushing West Ham back as they look for a third.
Suarez looks to be in after another long ball over the top, but Adrian, who incidentally was booked during the penalty drama, is off his line to clear.
Suarez is in behind the West Ham defence and attempts to square for Sturridge, only for the ball to hit Pablo Armero. The Liverpool striker is screaming for handball, but there's nothing doing this time.
Now it is West Ham's turn to feel aggrieved. They also need to find a way back into this game having been on the back foot for almost all the second half.
That's another huge call from referee Anthony Taylor, and it looks like another one he has got completely wrong.
West Ham are stunned. Lucas' through-ball found Flanagan breaking into the area, but Adrian looked to get a big hand on the ball before the Liverpool defender went down. Few appeals from the visitors, but Taylor points to the spot.
Sturridge attempts to find strike-partner Suarez with a ball into the box with the outside of his boot, but the pass has just too much pace on it.
Key tackle from Flanagan on the edge of his own box, sliding in to deny Diame after Noble's clever back-heel.
Another shot comes in from range from Sturridge, after more good link-up play with Suarez, but again he is way off target from the edge of the box.
That moment demonstrates the danger faced by Liverpool. They've had all of the ball this half, but have struggled to create a genuine chance and were inches away from falling behind.
OFF THE BAR!!!! Diame's cross is powered against the face of the crossbar by Andy Carroll with Mignolet well beaten.
Liverpool's possession is becoming much more meaningful and they are pressing West Ham further back here.
Appeals for handball from the Liverpool fans after Lucas and Taylor go for a ball in the box, but the visiting players and referee Taylor take no notice.
Sterling and Suarez link up well down the left, but the Uruguay striker's shot from inside the box across the goal lacks any real power and is easy for Adrian to gather.
Now Carroll is the man to be penalised after Jordan Henderson kicks the bottom of his foot after the Hammers striker gets his toe to the ball in the box.
Adrian has to be alert to sprint from his line and clear with his feet after Suarez was found in behind the West Ham defence.
Flanagan does well to win the ball from Carroll and then puts his foot into a 50-50 with Noble and comes out on top.
Sturridge tries to thread a pass through the defence to Sterling, but only finds the imposing figure of Demel.
The game looks to have returned to the pattern of the majority of the first half. Liverpool are afforded possession in their own half, but are closed down as soon as they head into the danger area.
Early spell of possession for Liverpool, but again the final ball is lacking and goes all the way through to Adrian.
The six-yard box is mobbed. Referee Taylor delays proceedings to speak to the players. Noble's ball comes in and is fisted away through a crowd by Mignolet.
The penalty, which was as clear as any you are likely to see, changed the complexion of the half, only for West Ham to respond immediately. The Hammers didn't deserve to be behind, but the manner of their leveller leaves a sour taste after Carroll's hand-off on Mignolet.
All the drama was reserved for the final few minutes of the half. Up until that point, West Ham had kept Liverpool very quiet with Suarez and Sturridge struggling to combine.
That's a big, big, moment, not just in the context of this game, but in the Premier League title race. Liverpool will be incensed and it will be interesting to see how they react after the break.
Replays show that Carroll went for the corner with his hand, but only succeeded in hitting Mignolet on the head. That contributed to the Liverpool keeper dropping the ball and is obviously what the assistant saw. Taylor, however, saw things differently and stuck with his original decision of allowing the goal to stand.
Taylor blows for half-time, but he is not a popular man among the Liverpool players and supporters. Rodgers is waiting for a word, too.
Chaotic scenes at Upton Park!!! Noble's corner is knocked down by Mignolet under huge pressure from Carroll and Demel puts the loose ball home. The linesman initially has his flag up, but after a conversation with referee Taylor the goal stands.
Really confident and composed penalty from the Liverpool captain as he sends Adrian the wrong way from the spot and rolls the ball home.
Great pass in to Suarez from Gerrard and he looks to lift the ball past Tomkins, he brings his arm through to cut it out. Clear spot-kick. Gerrard to take.
No joy for Suarez again as he receives Henderson's pass into his feet and then looks to find Coutinho, but West Ham clear.
Diame gets away from Flanagan far too easily on the right and then looks to play in Nolan. The Hammers midfielder attempts to roll his man, but cannot bring the ball under control and the chance is gone.
Coutinho attempts to clip a ball in over behind the West Ham defence, but puts too much on the pass and Adrian gathers comfortably.
West Ham take a free-kick and Diame clips a ball into the box, which Mignolet does well to punch to the edge of his area with Hammers shirts closing in quickly.
Another precision long-range pass from Gerrard - this time out to Suarez on the left flank. He plays in Sturridge, but the striker loses his composure at a key moment and lashes well wide.
Signs of frustration from Brendan Rodgers on the sidelines with his Liverpool side really struggling to break West Ham down.
A deep free-kick into the Liverpool box causes Mignolet problems and he can only fist weakly into the air with Carroll lurking, but Liverpool's defence stands firm and they win a goal-kick.
Flanagan has to be alert to head away under pressure from Carroll at the far post after a decent cross from Downing.
Liverpool are being given so little time on the ball when they head into West Ham territory. The home fans are snapping into challenges, which is being appreciated by the Hammers fans.
Noble takes responsibility with quick effort with hardly any run-up, but the ball whips wide of Mignolet's goal.
Free-kick to West Ham in a dangerous position as Sakho is penalised for bringing down Carroll, just a couple of yards outside the 'D' of the Liverpool box.
Snap=shot from Sturridge from the edge of the box after some lovely link-up play and one-touch passing with Henderson, but he gets under the ball and lifts it well over the bar.
Lovely pass from Gerrard from the centre circle with the outside of his boot to Sterling on the right flank, but his attempted ball in to Suarez is cut out too easily.
Nolan's clipped ball into the box deflects up and looks as though it may drop for Taylor, but Mignolet is quickly off his line to gather.
Danger for West Ham as Gerrard robs Nolan and then finds Suarez. Tomkins slides in, but the ball falls to Coutinho. He advances to the box and then passes to Suarez, whose curling effort is headed behind by Tomkins.
Henderson attempts a pass into Suarez's feet, but the Uruguay international immediately has two men around him and he loses possession, much to his frustration.
Carroll continues to cause problems in the box with his physical presence, before Downing attempts a first-time shot which is deflected away for a throw.
Good turn from Diame as he gets away from Flanagan on the edge of the box before lashing a shot narrowly wide of Mignolet's goal.
Downing's corner is cleared by Henderson to Suarez, who then sets Sterling racing away as Liverpool look to hit the Hammers on the break. He loses control of the ball somewhat, but manages to fire in a shot which warms Adrian's palms.
Now West Ham have a corner, as Nolan's ball out to Downing is returned into the box and Flanagan takes the safe option.
OFF THE BAR!!! Out of nothing, Suarez is inches away from opening the scoring. He collects Coutinho's throw, turns away from one man and then clips a ball towards the far post which beats Adrian but strikes the frame of the goal.
Superb pass from Gerrard switching the ball across the field to Flanagan. The young defender then sets Suarez haring away with a lovely first-time pass, but Tomkins is across to cover.
Liverpool's defence are coping well at present as West Ham - perhaps against expectations - press and probe rather than swinging balls in towards Carroll.
Decent spell of possession from Liverpool, which ends when Henderson's attempted cross is cut out and West Ham go back on the attack.
Gerrard attempts to curl a cross in towards the centre of the West Ham box, but Reid gets back well to head clear.
At the other end of the field, Carroll flicks on towards Nolan, but Skrtel is alert to the danger and clears his lines.
Suarez attempts a first-time pass into the box from out on the left flank, but only succeeds in finding Adrian.
Carroll wins the ball just inside the Liverpool half and advances towards the box, shaping to shoot twice before eventually unleashing an ambitious effort which thuds straight into Skrtel.
Nolan is penalised for a high foot as he challenges Coutinho on the edge of the Liverpool box. Both players had their studs showing, to be fair.
Gerrard's corner goes all the way through to Sterling on the far corner of the box. He drives in a low cross-shot which takes a deflection and loops up into the air for Adrian to gather.
Some handbags in the box which Taylor has to resolve as Henderson and Adrian are pushing and shoving.
Diame gets away from one man in a central position outside the Liverpool box, but just as he looks as though he is shaping to shoot, Johnson sneaks in a toe to win the ball.
Liverpool go back on the attack after successfully defending the corner, with Coutinho looking to make inroads down the left flank. He takes on Demel and then finds Henderson, but the move breaks down on the edge of the Hammers box.
Important header from Skrtel, getting up in front of Carroll to divert Diame's cross behind after the West Ham man got in too easily behind Flanagan.
Not far away from Suarez!! Ambitious attempt from the Liverpool striker, but he gets the ball up and over the wall and it's dipping towards the diving Adrian's goal before clearing the bar and disturbing the top of the net.
Noble is penalised after winning the ball from Sturridge and is unimpressed with referee Taylor's call. Liverpool have a free-kick some 35 yards out in a central position.
Sloppy pass from Johnson allows Nolan to break towards the box, but Sakho steps out to win the ball.
Scrappy opening with passes going astray from both sides, before Downing is released down the left and pulls a low cross into the box, which the back-tracking Gerrard clears.
Liverpool get the contest under way, chasing their ninth successive Premier League win and a return to the top of the table.
How are those nerves? If you're feeling it as fans, we'll have to hope the players can keep their emotions in check as the season enters a pivotal phase.
West Ham and Liverpool emerge through the bubbles to the traditional Hammers anthem and begin the pre-match formalities.
The two teams are in the tunnel and about to make their way out onto the Upton Park playing surface.
Dave Carter writes: "I'm a West Ham fan but would like to see Liverpool win the title - maybe a 2-2 draw."
If you fancy having a flutter on today's clash, our friends over at Sky Bet have a host of markets available. Liverpool are the odds-on 4/11 favourites to win, West Ham are on offer at 13/2 and the draw is a 9/2 shot.
Opta stat No.4: Liverpool have dropped more points from winning positions than any other team in the Premier League away from home (12).
Opta stat No.3: Luis Suarez has scored six goals in his last five Premier League matches and is just two away from the Premier League record for a 38-game season (31) held by Alan Shearer (1995-96) and Cristiano Ronaldo (2007-08).
Opta stat No.2: Liverpool have scored 88 goals this season, a record for any team after 32 matches of a Premier League season and have found the net in their last 22 games since losing 2-0 at Arsenal.
Opta stat No.1: Liverpool have won seven and lost just one of the last 10 Premier League games against West Ham.
Chris Green writes: "I think Rodgers' side will be too strong for the Hammers this afternoon. Prediction: West Ham 0-3 Liverpool, with Gerrard, Coutinho and Suarez scoring the goals."
Rodgers also told Sky Sports he didn't watch Manchester City or Chelsea's victories yesterday, although he was aware of their results. He said: "It's of no relevance to us, really. For us, it's about the game today and there's no point worrying about anything else."
Brendan Rodgers has been speaking to Sky Sports before the game and has explained Daniel Agger's absence from his side today: "Daniel hurt his knee and had to come out of training and isn't able to play. It shouldn't be too serious - he's just had to miss today and was touch and go."
PJ Lynch writes:"West Ham are an outstanding team! As a Liverpool fan I have enjoyed our recent run of form and hope we can keep it up today and go back to the top. For me it's 2-0 Liverpool with Suarez and Sturridge scoring."
Liverpool fan Jordan Wright adds: "I predict 3-2 to the mighty Reds! Suarez, Gerrard, and Sturridge the goalscorers! Just hoping to come away with three points to take us back top!"
Keith Hitchcock has spotted a potential danger for Liverpool today: "There's a chance that Downing, Cole and Carrol could scupper our chances of three points today. We must watch the set-pieces and not commit stupid fouls."
Dave Mould, a Liverpool fan in Norwich reckons: "This one will be a tough one to call, I think the ex-Pool players at West Ham will be keen to show what they can really do. I think a closer result than would be expected. Hard fought 0-2 to Liverpool, goals late on to claim all three points. YNWA!!"
Dave Lea says: "Expecting great things from our Red army today, another really strong starting line up, but it will be a tricky game. I expect we'll be defending a long-ball game from the Hammers. West Ham 1-3 Liverpool - Suarez, Sturridge and Henderson each getting a goal today!"
Scott from Warrington writes: "Could do with a favour from the Anfield old boys - Carroll and Downing to have a quiet game. Hope the Reds don't let the nerves get the better of them. I'm going for 2-1 to Liverpool."
Hammers boss Sam Allardyce has selected captain Kevin Nolan after he overcame a back problem, but is forced to replace the injured George McCartney, with on-loan Napoli full-back Pablo Armero making his first start for the club.
Rodgers has recalled Mamamdou Sakho in place of Daniel Agger in his defence - presumably as he looks to counter the physical presence of former Liverpool forward Andy Carroll.
If you want to have your say on today's game, then drop me a line to firstname.lastname@example.org or via Twitter @skysportsrobp and I'll publish a selection of the best prior to kick-off.
West Ham: Adrian, Reid, Nolan, Tomkins, Armero, Carroll, Taylor, Noble, Demel, Diame, Downing. Subs: Jaaskelainen, Jarvis, C Cole, J Cole, Potts, Johnson, Nocerino.
Liverpool: Mignolet, Johnson, Flanagan, Sakho, Skrtel, Gerrard, Henderson, Coutinho, Sterling, Suarez, Sturridge. Subs: Jones, Toure, Cissokho, Lucas, Moses, Allen, Aspas.
West Ham, meanwhile, effectively secured their Premier League status for another season with Monday's win away to struggling Sunderland, but need a few more points on the board before they are mathematically certain to be staying up.
But Manchester City and Chelsea - who both have to visit Anfield in the coming weeks - kept up the pressure on Brendan Rodgers' men with comfortable victories on Saturday.
Liverpool's title destiny is in their own hands - win all six of their remaining fixtures and they will be crowned champions for the first time since 1990.