West Ham 2-1 Liverpool: FA Cup fourth round replay as it happened

That is all for this particular live blog. Thanks for joining us and stay tuned to IBTimes UK for the latest reaction.

Goodnight.

Captivating late drama in east London as Ogbonna pops up in the 121st minute with his very first goal in English football that sends West Ham through to the last 16 and avoids a tense penalty shootout.

Bilic's side will now face Blackburn Rovers at Ewood Park on Sunday 21 February.

Full-time

West Ham 2-1 Liverpool

Extraordinary.

West Ham win a free-kick on the right-hand side following Lucas' foul on Valencia. Payet then steps up to send in a deep ball that Ogbonna, soaring high above Flanagan and Stewart, heads powerfully past Mignolet and into the far corner.

Surely that's the goal that will send the Hammers into round five.

Goal: West Ham 2-1 Liverpool (Angelo Ogbonna)

Two minutes of added time signalled by the fourth official.

Excellent close control on display by Sturridge as he weaves through Collins and Noble before having the ball knocked away by Ogbonna.

He then wins a corner off Collins with an attempted flicked finish at the near post and Flanagan goes close with a header.

West Ham have long since made their last change so Valencia comes back on for the final few minutes. It will be interesting to see if he takes a penalty, should there be no winning goal.

The stretcher comes on for Valencia but he eventually leaves the field under his own volition.

The West Ham supporters cry for a free-kick after a tough challenge from Flanagan on Carroll, but referee East plays advantage. The Liverpool right-back is a tad fortunate not to be cautioned for that.

Another injury delay now as Valencia receives treatment after being caught on the follow through from Lucas' committed block.

Origi is the next Liverpool player to try his luck, but it's a difficult angle and his shot was never likely to test Randolph.

Flanagan then dispossesses Payet but Benteke's wild effort is dragged well wide.

Milner finds fellow sub Sturridge and the striker sprints forward with pace. With Collins backing off, he produces a fierce left-footed drive that whistles just over.

After a short break, proceedings are back underway. Is there a winner to be found late on here, or are we destined for the lottery of spot-kicks?

15 minutes away from a penalty shootout...

Half-time in extra-time

West Ham 1-1 Liverpool

Another opportunity for Benteke as he heads Origi's cross narrowly over the top.

Lucas then concedes a corner during a challenge with Payet but Smith does well to head clear at the front post.

Liverpool are going to make their final substitution now as James Milner comes on for Pedro Chirivella.

Smith must be fine to finish the game.

An unmarked Noble lets fly with an accurate shot from distance after receiving possession from Payet. Mignolet gets across to make the save.

At the other end, Benteke has two chances to score. First he sees a volley drift wide of the post, then he is sent clean through only to be thwarted by the legs of Randolph.

That will not do his fragile confidence much good at all.

Horrible miscue from Aaron Cresswell after Moses wins a corner from Smith, who is currently clutching his hamstring in pain.

It could just be cramp, although Klopp does have one change remaining if he cannot carry on.

East blows his whistle and the first period of extra-time is upon us.

That was unquestionably a more entertaining affair than the original tie at Anfield last month. There have been no shortage of chances, penalty appeals and talking points.

Klopp will be pleased with his young side and he has enough senior players on the field now to make the difference. West Ham, who have used all three of their substitutes, will be relying upon the likes of Antonio, Moses and Payet to create for Valencia.

End of 90 minutes

West Ham 1-1 Liverpool

One last half-chance for the hosts as Obiang breaks forward before shooting wide.

We are heading to extra-time at the Boleyn Ground.

West Ham appeal for handball as a delivery from the right strikes Lucas. The referee does blow his whistle, but it's for a push from Carroll on Stewart.

A corner at either end as Collins, who felt he was fouled, has a tame shot saved by Mignolet and Sturridge then bends his own effort well over the crossbar.

East is coming in for considerable stick from both sides as we edge towards the end of normal time.

Quick thinking from Liverpool as they take a quick free-kick after Ogbonna's foul. Collins clears Sturridge's low ball as far as Ibe, who produces a firm drive that is parried by Randolph.

Sturridge looks to turn home the rebound but it's cleared in the nick of time.

Eight minutes of added time for one of these teams to find a winner and avoid an extra 30.

The offside flag goes up against Carroll, which leads to another break in play as Stewart writhes in a considerable discomfort after a nasty collision that could conceivably have broken his leg.

Amazing that he is able to continue.

West Ham used their final change before that chance, with O'Brien, who was sporting a nasty gash on his knee, replaced my Moses.

Antonio is now cautioned for chopping down Origi.

Poor concentration from Origi as he gives possession away in the West Ham half. Payet immediately seizes the initiative and curls in a cross towards the back post that Valencia heads over.

With Coutinho off the pitch, Benteke curls a powerful free-kick on target that is parried by Randolph.

10 minutes of the 90 left to play.

That is more like it from Sturridge as he combines nicely with Benteke before winning a free-kick in a good position courtesy of a cute nutmeg on O'Brien.

Despite a quick change of footwear, Sturridge has been a virtual bystander since replacing Coutinho. He tries to send through Origi with a low pass but Randolph races out to collect.

After receiving medical attention, Kouyate is back on his feet. He clearly remains dazed, though, and former Liverpool striker Andy Carroll is sent on instead.

Flanagan appears to be fine.

Concern here for Kouyate after he comes off much worse following a clash of heads with Flanagan.

Brilliant from Antonio as he skillfully beats Smith before whipping an enticing cross into the six-yard-box. Valencia tries to apply the finish touch but he goes down appealing for a foul after a tug on the arm from Ilori.

Nothing given, but that looked like a definite penalty.

Disappointing scenes for Bilic and West Ham as Reid limps off after pulling up holding his hamstring.

He will not be able to continue and James Collins comes on in his place.

Antonio finds nothing but air with a tricky attempted volley. He keeps the attack alive, however, eventually producing a hopeful cross with the outside of his boot that Mignolet has to push over the bar.

Evidently bothered by the thought of extra-time, Klopp makes two attacking changes.

Sturridge replaces Coutinho for his first outing since a 2-0 defeat at Newcastle on 6 December and Origi is on for Teixeira.

A nervy moment for Mignolet as he spills a cross during a challenge with Kouyate and goes charging after the loose ball. Luckily for him, Stewart is nearby to hack clear.

Smith has impressed in the cup competitions for Liverpool this season and he proves his attacking prowess again by working the ball inside for Benteke, who is denied a goal by a brilliant Obiang block.

Referee Roger East denies West Ham's appeals as Valencia tumbles under the challenge of Smith and Noble's long-range shot strikes a hand.

Well, that equaliser certainly didn't take long. After Benteke is fouled by Obiang during a strong run across the edge of the box, Coutinho takes advantage of a leaping wall to roll a clever low effort past Randolph and into the back of the net.

How glad Klopp will be to have the Brazilian back in action.

Goal: West Ham 1-1 Liverpool (Philippe Coutinho)

The second half is now off and running. Will this tie be settled inside 90 minutes, or will we need extra-time and penalties?

A trip to Championship outfit Blackburn Rovers awaits the winners in round five.

Half-time

West Ham 1-0 Liverpool

Just one minute before the break, West Ham are ahead.

Payet feeds Valencia, who charges into the box and produces a cross that takes a big deflection off Flanagan before looping to the back post where Antonio is on hand to volley past Mignolet and into the far corner.

Fine finish.

Goal: West Ham 1-0 Liverpool (Michail Antonio)

The goal frames are taking an absolute battering here.

After Ibe fouls Kouyate in a dangerous central position, Payet steps up to bend a quality free-kick against the post. It looked like Mignolet just got a hand to it.

In the ensuing melee, Antonio looks to head home the rebound but Mignolet punches clear.

Coutinho has caused West Ham real problems with his delivery from corners in this opening 35 minutes.

A latest looped ball finds Benteke at the back post, but his stooping header is saved by Randolph.

Liverpool come forward with purpose as a heavy pass from Coutinho sends Benteke wide of goal.

The Belgian striker then shows quick feet to tee up Coutinho at the front post, but his shot crashes against the woodwork.

Coutinho and Smith break with real speed once again down the Liverpool left. After another smart cutback from the Australian, it breaks for Teixeira but he lashes a right-footed shot just wide of the post under pressure from Obiang.

Liverpool break quickly as the rapid Smith head towards the byline. He pulls the ball back into the penalty box, but no-one is able to take advantage.

Kevin Stewart is then shown the first yellow card of the night for a foul on Kouyate.

Brad Smith is penalised for handball, but Payet's dangerous free-kick towards Enner Valencia is cleared behind and the subsequent corner comes to nothing.

West Ham come agonisingly close to taking the lead as Payet releases O'Brien in acres of space down the right channel, but the defender's powerful low shot smacks against the base of the near post and clear.

So unlucky.

Goalmouth action at last as a corner from Coutinho is headed back across goal by Benteke. Teixeira is unable to get a shot away and Kouyate eventually pokes the ball away from danger after it strikes the arm of O'Brien.

Benteke threatens again from the next delivery but his effort at the back post is diverted behind by Randolph.

West Ham are seeing plenty of the ball early on, but a combination of sluggish movement off the ball and surprisingly compact defending from this much-changed Liverpool back four is denying them any space in behind.

It's been a relatively calm start here, which is probably best for the frequently animated Klopp just 48 hours removed from surgery to remove his troublesome appendix.

Dimitri Payet will presumably be seeking to make an impact tonight after West Ham released an official statement earlier on Tuesday to reject reports that the highly-rated Frenchman had demanded an improved contract worth £125,000-per-week.

They did admit that talks were ongoing over a new deal, however. Payet has made quite the impression since joining from Marseille for £10m in June 2015.

Clever play from Jordon Ibe to nutmeg Obiang and release Joao Teixeira, but Ogbonna gets across well and uses his physicality to shepherd the ball out of play for a goal kick.

Definitely no penalty.

After a tribute to mark 10 years since the death of former West Ham and England manager Ron Greenwood, we are underway.

O'Brien, who came on as a first-half substitute during the original tie at Anfield, has not started at all for West Ham since their failed Europa League qualifying campaign last summer.

He plays tonight as a solution to a right-back crisis that has seen Arsenal loanee Carl Jenkinson suffer a season-ending knee injury. January signing Sam Byram is cup-tied and James Tomkins hurt his calf at Southampton.

Also absent for Liverpool is Jordan Rossiter, although the young midfielder could return from hamstring trouble later in February.

Joe Gomez and Danny Ings remain long-term absentees, but Divock Origi is included in the squad tonight for the first time since Boxing Day.

Liverpool's back four make give cause for legitimate concern tonight.

Although supporters will be delighted to see Jon Flanagan make what is only his second senior start after a serious knee injury kept him sidelined for 18 months, a centre-back pairing of Tiago Ilori and midfielder Lucas is likely to be sorely tested.

Martin Skrtel recently suffered a setback in his recovery from a hamstring problem sustained at Watford in December. The Slovakian is expected to miss two or three more weeks, while Dejan Lovren and Joe Allen both limped out of that draw with Sunderland before half-time.

Kolo Toure and Mamadou Sakho are both rested as Klopp's side play their 12th match of 2016 already.

As for West Ham, Slaven Bilic makes five changes to the team that fell to a 1-0 defeat at Southampton last time out.

Second-string goalkeeper Darren Randolph replaces Adrian, while Joey O'Brien makes his first start since July at right-back. Angelo Ogbonna is paired with Winston Reid in the heart of defence and Pedro Obiang deputises for Alex Song.

Cheikhou Kouyate has recovered from an eye infection and he comes back in at the expense of Victor Moses.

So 10 changes in all from Klopp, who keeps faith in many of Liverpool's younger players in cup competition. Simon Mignolet is the only member of that starting XI to retain his place from Saturday's draw with Sunderland.

Coutinho returns after being sidelined for over a month with a hamstring injury, while Christian Benteke leads the line. Injury-plagued striker Daniel Sturridge is named on the bench for the second match running as he seeks to make his first appearance since early December.

West Ham: Randolph, O'Brien, Reid, Ogbonna, Cresswell, Noble, Obiang, Antonio, Kouyate, Payet, Valencia

Substitutes: Adrian, Carroll, Collins, Moses, Oxford, Cullen, Parfitt-Williams

Liverpool: Mignolet, Flanagan, Lucas, Ilori, Smith, Stewart, Chirivella, Teixeira, Coutinho, Ibe, Benteke

Substitutes: Ward, Enrique, Milner, Henderson, Sturridge, Origi, Randall

Despite that, Liverpool do boast a strong recent FA Cup record against tonight's opponents. They have not tasted defeat in seven previous clashes with West Ham in this competition.

Team news and confirmed lineups to come very shortly...

This is the fourth time that these two sides have faced-off during the 2015-16 season, with Liverpool having lost both Premier League meetings.

Philippe Coutinho and Mark Noble were each dismissed during a comprehensive Hammers win at Anfield in August, while their most recent meeting in January finished 2-0 courtesy of a header in each half from Michail Antonio and Andy Carroll.

Following a dour goalless draw on Merseyside last month, West Ham and Liverpool reconvene at Upton Park this evening for one of only two FA Cup fourth-round replays.

The visitors will have Jurgen Klopp back on the touchline for this one after he missed Saturday's Premier League clash with Sunderland due to a painful bout of appendicitis.

Liverpool led 2-0 against the struggling Black Cats courtesy of goals from Roberto Firmino and Adam Lallana, but a late equaliser from Jermain Defoe only served to exacerbate the sense of anger and gloom brought on by a pre-planned protest against the club's new ticket pricing structure that saw as many as 10,000 home fans desert Anfield in the 77th minute.

The fallout from that row has continued in recent days, with many past greats lending their support to the cause. It would be a huge surprise not to see emotive banners and flags unfurled in the away end during tonight's match.

Kick-off is at 19.45 GMT, so stay with IBTimes UK for live coverage throughout....