West Ham look content to keep possession and see out the remaining seconds.
90'
Roberts sneaks in at the back post to meet Collins' cross, but his header deflects off the back of Kehrer and harmlessly away from danger.
There will be three minutes of additional time at the end of this match.
89'
Aguerd has looked very assured at left centre-back, but a rare mistake sees him let the ball go under his foot and out for a throw-in to the hosts. It ends up coming to nothing though.
87'
M. Lanzini enters the game and replaces Pablo Fornals.
Moyes puts on Lanzini for Fornals.
83'
Mubama shows great strength to win the ball back and then win a free-kick as the minutes continue to tick away.
81'
Time is running out on the Rams if they are to force a replay. The visitors have defended resolutely to this point and have not showed much sign of letting their two-goal advantage slip.
78'
A. Cresswell enters the game and replaces Emerson.
D. Mubama enters the game and replaces J. Bowen.
Emerson makes way for Cresswell on West Ham's left.
Young striker Mubama comes on for Bowen, who set the Hammers on their way with his 10th-minute strike.
73'
Johnson lets fly with a rasping drive, but Wildsmith does well to punch it away and keep the scoreline at 2-0.
71'
J. Rooney enters the game and replaces C. Hourihane.
Warne puts on Rooney for Hourihane as he tries to get his side back into the game.
Minute
Description
70'
T. Souček gets yellow.
Soucek is booked for a late challenge on Thompson in midfield.
69'
Johnson blasts a first-time cross into the box, but Cashin does superbly to hack clear before Bowen can reach it.
66'
Dobbin's first act after his introduction is to hoist a dangerous delivery to the back post, but none of the three Derby players waiting at the back post are able to scramble anything goalwards.
64'
S. Benrahma enters the game and replaces M. Antonio.
Benrahma, who scored West Ham's winner in the last round against Brentford, replaces Antonio.
63'
L. Dobbin enters the game and replaces C. Davies.
Dobbin, on loan from Everton, is the last of the quadruple change as he comes on for Davies.
62'
E. Cashin enters the game and replaces T. Barkhuizen.
T. Springett enters the game and replaces N. Mendez-Laing.
Springett enters the fray for Mendez-Laing.
Barkhuizen makes way for Cashin.
61'
L. Thompson enters the game and replaces M. Bird.
Bird does indeed come off, with Thompson on to replace him.
60'
Bird looks in pain after going down under no contact. It appears Warne will have to make a change here.
58'
Mendez-Laing wins a couple of corners in succession after he sees crosses blocked behind by Aguerd and then Ogbonna. Derby cannot capitalise though as West Ham keep them out with relative ease.
56'
Antonio nods a delivery from the right back across the face of goal, but none of his team-mates are there to turn it in and Derby clear the danger.
55'
Moyes' side are pushing for a third goal here that would surely put this tie to bed, as Derby's defenders are forced to deal with a couple of threatening crosses.
50'
M. Antonio has scored a goal for West Ham United!
Goal!!! Antonio makes it 2-0 to the visitors! The ball finds itself with Bowen on the right of the Derby box, and his low cross deflects perfectly off Forsyth for Antonio to nod home at the back post. Derby have a real mountain to climb now.
47'
Knight makes space for a shot just outside the box, but his low effort skims wide. This is an encouraging start to the second half though from Derby.
46'
The hosts get us back underway for the second period.
45' +1
HALF-TIME: DERBY COUNTY 0-1 WEST HAM
45'
Barkhuizen curls well over Areola's crossbar before the fourth official puts up his board and indicates there will be one minute of additional time.
43'
Mendez-Laing drives to the byline past Emerson and looks to pull the ball back for a team-mate in the middle, but Ogbonna is well-placed to hack it clear before a Derby player can get to it.
39'
Aside from Bowen's goal, this game has lacked in attacking quality and there has been a real dearth of clear-cut chances.
37'
Derby are not overly convincing as they try to deal with the corner, but they are able to eventually scramble it clear.
36'
Emerson wins a corner after an exquisite diagonal ball from Soucek. Can Moyes' men find a second goal here?
34'
Collins tries an audacious left-footed volley, but the ball comes off his shin and Areola watches it fly well wide of his goal.
24'
After Emerson receives some treatment following the challenge from Smith, the resulting free-kick is poor and easily gathered by Wildsmith. That was a wasted opportunity for the Hammers.
22'
K. Smith gets yellow.
Smith is the first player to go in referee Thomas Bramall's book after bringing down Emerson on the touchline.
21'
Hourihane tries his luck with an ambitious effort from range as Derby search for an equaliser, but his left-footed effort flies well wide.
19'
Bowen looks to race onto Aguerd's long throughball, but Wildsmith is alert and out of his goal quickly to stamp out of the danger before the West Ham man can score his second of the game.
17'
Antonio gives the ball away and Derby charge forward in numbers. However, they cannot take advantage of Antonio's error as Knight sloppily hands possession back to the visitors.
14'
Mendez-Laing floats a delightful ball into the West Ham box, but Collins just cannot quite jump high enough to meet it and nod goalwards.
10'
J. Bowen has scored a goal for West Ham United! Assist by T. Souček.
Goal!!! West Ham take the lead! It is Bowen with the goal, but Soucek plays a big part in it too. Antonio flicks a lovely ball over the Derby defence, and Soucek cleverly nods it across to Bowen, who coolly finishes to make it 1-0 to the visitors!
Soucek's header to Bowen was perfectly weighted to allow the former Hull City man to fire home first time.
7'
Derby want a free-kick after Ogbonna bundles over Knight in midfield, but the referee waves play-on, much to the frustration of the home fans.
5'
It has been a cagey opening here as both teams try to settle into the game.
3'
Antonio has the first attempt of the match after charging into the box, but his drive from a tight angle flies well wide of Wildsmith's goal.
1'
The visitors kick us off and we are underway!
Hello and welcome to live coverage of the FA Cup fourth-round clash between Derby County and West Ham at Pride Park.
The hosts come into this tie hoping to make the fifth round of the FA Cup for the first time since the 2019-20 campaign. The League One side are in great form, having won seven of their last eight in all competitions, and will be looking to pull off the upset here.
Against a side two divisions below them, the visitors will hope to keep their hopes of lifting this famous trophy for a fourth time alive. The Hammers have struggled in the Premier League, winning just five of their 20 games so far this campaign to sit 16th, but progressing to the next round here could help them kick on in the remainder of the season.
DERBY COUNTY (4-2-3-1): Joe Wildsmith; Korey Smith, Craig Davies, Craig Forsyth, Haydon Roberts; Conor Hourihane, Max Bird; Nathaniel Mendez-Laing, Jason Knight, Tom Barkhuizen; James Collins.
SUBS: Tony Springett, Scott Loach, Richard Stearman, Liam Thompson, Lewis Dobbin, Jake Rooney, Eiran Cashin, Darren Robinson, Dajaune Brown.
WEST HAM (3-4-2-1): Alphonse Areola; Angelo Ogbonna, Thilo Kehrer, Nayef Aguerd; Ben Johnson, Tomas Soucek, Flynn Downes, Emerson; Pablo Fornals, Jarrod Bowen; Michail Antonio.
SUBS: Aaron Cresswell, Declan Rice, Divin Mubama, Levi Laing, Lucas Paqueta, Lukasz Fabianski, Manuel Lanzini, Said Benrahma, Vladimir Coufal.
The winner of this tie will play Manchester United at Old Trafford in the fifth round. That is some prize up for grabs, as the two teams make their way onto the pitch at Pride Park.
While Warne's men have held their own here, they have not tested Areola yet in the West Ham goal. They will need to find more of an attacking output if they are to get back into this tie.
West Ham's reward will be a tie away at Old Trafford against United, though they must turn their attentions back to the Premier League first as they look to pull away from the relegation zone. For Derby, their cup dream is over, but they could still be lifting silverware come the end of this season as they bid to get back into the Championship at the first time of asking following their relegation last term.
Thanks for joining us for live coverage of West Ham's 2-0 FA Cup fourth-round victory over Derby County at Pride Park.
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