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Key Events

87'
A. Masuaku
Yellow Card
79'
A. Ayew
M. Antonio
70'
Pedro Obiang
Yellow Card
69'
D. Sakho
M. Arnautović
68'
A. Cresswell
Yellow Card
67'
W. Reid
Yellow Card
64'
Willian
D. Zappacosta
58'
Adrián
Yellow Card
55'
V. Moses
Marcos Alonso
46'
Pedro
T. Bakayoko
18'
Marcos Alonso
Yellow Card
7'
M. Arnautović
Yellow Card
6'
M. Arnautović
Goal
6'
M. Lanzini
Assist
2
6
3
1

Stats

Possession
% %
1
8
Shots Off Target
Shots On Target 2 2
Total Passes 299 683

Commentary

Thanks for joining our commentary this afternoon. Until next time, goodbye.
West Ham earn a vital win in their battle against the drop as Marko Arnautovic's early strike has handed them the three points against Chelsea this afternoon. The Austrian fired home with a sweet left-footed strike in the sixth minute and the Hammers were able to stifle the Blues with a rearguard action to bring David Moyes his first win as the club's manager. Antonio Conte's men are slowly slipping out of the race for the Premier League crown following their fourth defeat of the campaign.
FULL-TIME: WEST HAM 1-0 CHELSEA
90' + 5' The referee ends the contest.
90' + 4' Pedro swings a cross in from the right, but it goes over the head of Morata and into the hands of Adrian. West Ham are within touching distance.
90' + 3' OVER! Fabregas latches on to a loose ball on the edge of the box, but he can only fire his effort well over the bar.
90' + 1' Ogbonna makes a well-timed challenge in the box to stop Kante from turning inside the box. The Hammers are almost over the line.
90' There will be five minutes of added time.
89' Chelsea's attacking players have been below-par this afternoon and Fabregas sums up their performance by overhitting a simple throughball to Moses.
87' West Ham assistant boss Stuart Pearce does his effort for the cause by wasting a bit more time booting the ball into the stands.
A. Masuaku
Yellow Card
West Ham United
87' Masuaku goes into the book for time-wasting.
86' Chelsea probe on the edge of the box, but Morata is caught offside from Azpilicueta's ball over the top. In thje build-up Obiang wiped out Moses, but fortunately for him the referee did not go back to the incident.
84' OVER! Kante and Morata combine in the final third to tee up Hazard on the edge of the box, but the Belgian lifts his strike over the bar.
83' CHANCE! THAT WAS THE MOMENT FOR MORATA! Kante's throughball gets through the West Ham line and the Spaniard is not offside. He fires at goal from close range on the half-volley, but he puts his effort past the post. 
80' There's 10 minutes left for West Ham to hold out. Can the Hammers secure a vital win in their battle against the drop this afternoon?
A. Ayew
M. Antonio
West Ham United
79' Ayew replaces Antonio for the home side.
78' Antonio is beginning to show the effects of his exploits this afternoon. He will be replaced shortly.
76' Morata fouls Adrian from the resulting corner. It has not been the best of matches from the Chelsea forward.
75' Hazard surges into the left inside channel and he wins a corner for the visitors as his effort is blocked into the legs of Obiang by Reid.
72' Chelsea probe down the left, but Hazard's low cross is cut out by Zabaleta at the near post. There's been a wall of claret in front of Adrian all afternoon, thwarting the visitors.
Pedro Obiang
Yellow Card
West Ham United
70' Obiang is the latest West Ham player to head into the book for a loose challenge on Kante.
D. Sakho
M. Arnautović
West Ham United
69' Sakho replaces Arnautovic for the home side.
69' BLOCK! Reid puts his body on the line for the Hammers with an important block to deny Christensen on the volley. The ball fell for the defender from Fabregas' free-kick, but the New Zealand international was there to make the intervention.
A. Cresswell
Yellow Card
West Ham United
68' Willian gets the better of Cresswell on the right flank and the defender brings him down before he can cross into the box, resulting in a booking.
W. Reid
Yellow Card
West Ham United
67' Reid chops down Morata and goes into the book.
66' A bizarre moment for Pedro as he tries to take a throw-in, but the ball slips from his grasp. He's fortunate to get the opportunity again as the referee deems that it was not a foul throw.
Willian
D. Zappacosta
Chelsea
64' Willian replaces Zappacosta for the visitors.
63' Masuaku drives down the left and wins a corner off the legs of Moses. However, Lanzini sends the corner over the heads of everyone in the penalty area.
62' Arnautovic latches on to a loose ball in the final third, but he cannot pick out the forward run of Antonio in the box. West Ham need to capitalise on these moments.
60' Zabaleta puts the pressure on Zappacosta down the right flank and he almost wins the ball, only for the linesman to signal for a foul against the Chelsea defender.
Adrián
Yellow Card
West Ham United
58' Adrian goes into the book for time-wasting.
58' CLOSE! Zappacosta collects on the left flank and checks back to swing a low ball into the box. His cross misses Hazard's run, but continues to travel to the back post and just misses the target. Adrian was beaten there by the Italian.
56' Fabregas plays the ball short to Moses, but the wing-back cannot fire the ball across the face of goal from the right inside channel.
56' Obiang lunges as Morata surges past him and the Spaniard goes down 30 yards from goal. Chelsea have a free-kick in a central position and Fabregas may look to strike this one.
V. Moses
Marcos Alonso
Chelsea
55' Moses replaces Alonso for the visitors.
53' PENALTY SHOUT! Arnautovic knocks the ball past Christensen and the ball strikes the hands of the Dane. The forward and the home fans scream for a penalty, but the referee waves play on.
52' BLOCK! Ogbonna makes an important block at the back to stop Fabregas' stooping header after the Spaniard latched on to Zappacosta's cross.
51' OFFSIDE! Cahill misplaces a pass straight to Antonio and the break is on for the Hammers. Antonio has Arnautovic in support, but he delays the pass and although he releases the Austrian the offside flag goes up.
50' Chelsea work their way into the box and Cresswell has to act at the near post to stop Fabregas' cutback from reaching Morata in the six-yard area. A vital stop from the defender.
49' WIDE! Chelsea probe on the edge of the box before Zappacosta lifts a cross to the back post. Zabaleta heads clear, but only as far as Pedro. However, he sends his effort narrowly wide of the post, although it did not look overly threatening to Adrian.
Pedro
T. Bakayoko
Chelsea
46'  An attacking change for Chelsea at the break as Pedro replaces Bakayoko.
46' We're back underway at London Stadium.
The players are back out for the second half, so we should be underway shortly.
Marko Arnautovic's first goal for West Ham has handed David Moyes' men the lead at the break against Chelsea. The Austrian worked well with Manuel Lanzini in the final third before firing his effort past Thibaut Courtois. The Blues responded to put serious pressure on the home side's backline, but were restricted to efforts from distance, failing to carve out a clear-cut opening. It's all going to plan for the home side at the interval.
HALF-TIME: WEST HAM 1-0 CHELSEA
45' + 2' The referee ends the first half.
45' There will be two minutes of added time.
45' Lanzini sends a poor cross to the near post and Morata heads away the danger. Arnautovic tries to turn and shoot on the edge of the box, but fires a tame effort into the hands of Courtois.
44' Masuaku drives forward down the left and wins a corner off the legs of Azpilicueta. What a time this would be to get a second for the home side.
42' The Hammers waste an opening to put the pressure back on Chelsea as Lanzini sails a cross straight into the hands of Courtois. The Blues break back upfield and continue their siege on the edge of the box.
40' Antonio puts Christensen under pressure at the back by chasing down the ball. Courtois tries to help his team-mate, but succeeds in conceding a corner by slicing his clearance.
38' Chelsea break with numbers and space opens up for Bakayoko to shoot on the edge of the box. His effort is deflected wide of the post, and the pressure continues to build on the home side.
37' WIDE! Masuaku seizes on a loose ball and drives forward before firing at goal, but he pulls his effort well wide of the target.
35' Chelsea continue to probe and Fabregas' lofted pass opens up the West Ham backline, but Masuaku gets back to stop Hazard from shooting. The ball bounces in the box and Morata attempts to pounce, only to be denied by Reid.
33' WIDE! Morata sends the ball out wide of Zappacosta and latches on to his cross into the box after drifting between Ogbonna and Reid, but he cannot direct his header at goal under pressure.
31' Chelsea are starting to exert serious pressure on the West Ham backline. They're passing the ball precisely on the edge of the box, but are just lacking the final ball at the moment to create the clear-cut chance.
29' CHANCE! Chelsea work the ball neatly from the corner and space opens up for Zappacosta to strike at goal on his left foot. His effort is hard and low towards the bottom corner, but Adrian gets down to make a one-handed stop. Morata tries to pounce on the rebound only to be flagged offside.
28' SAVE! Alonso fakes out Zabaleta on the left and pulls the ball back into space for Kante on the edge of the box. The Frenchman fires at goal, but Adrian gets down to make the stop, turning the ball past the post.
27' Arnautovic gets the better of Christensen in the final third and manages to break into the box, but Cahill gets back to help out his team-mate to block the Austrian's strike.
24' BLOCK! Fabregas threads the needle of the edge of the box to find Bakayoko in the penalty area. The midfielder goes for the first-time strike, only to be denied by Reid.
23' Cresswell has to make a strong challenge down the left to stop Zappacosta's forward run and he wins the 50/50 challenge, sending the ball out for a throw.
21' CHANCE! Zappacosta lifts the ball into the box and it deflects off the head of Morata to the back post. Hazard is unmarked and strikes the ball out of the air, but he pulls his left-footed effort across the face of goal. It would have only needed a touch from a Chelsea player to find the net, only to end in a goal-kick for West Ham.
20' The pressure on the ball from the home side is yielding mistakes from the Blues. It's all going to plan for Moyes at the moment.
Marcos Alonso
Yellow Card
Chelsea
18' Alonso goes into the book for colliding late with Adrian.
16' Chelsea are struggling to match the early intensity of the home side. Their frustration is starting to boil over by looking at the referee after almost every brush of contact.
14' PENALTY SHOUT! Morata turns away from Reid in the box and goes down under pressure, but the referee waves play on. The Spaniard went to ground fairly easily there.
12' Kante tries to lift the ball over the top of the West Ham backline for Hazard's run, but his pass goes straight through to Adrian.
10' Antonio wins a free-kick down the right for the home side, but from the resulting cross, Ogbonna fouls Alonso at the back post.
9' The Hammers have put Chelsea well and truly on the back foot in the opening stages of the match. The Blues are struggling to string a series of passes together in the West Ham half.
M. Arnautović
Yellow Card
West Ham United
7' Arnautovic jumps into the crowd and gets booked for his celebration.
M. Arnautović
Goal
West Ham United
6' GOALLLLLLLLLL!!!! ARNAUTOVIC FIRES WEST HAM AHEAD! The Hammers took the early initiative and have taken the lead through Arnautovic. They worked their way through Chelsea's backline with neat interplay as the Austrian played a one-two with Lanzini before creating half-a-yard of space to curl his left-footed strike beyond the reach of Courtois.
M. Lanzini
Assist
West Ham United
6' Lanzini slides a low pass into the feet of Arnautovic, allowing the forward to fire home.
4' The Argentine lifts the ball into the box, and although the visitors clear the danger, West Ham keep the pressure on. However, Noble alleviates the strain by sending his cross out for a goal-kick.
3' Lanzini bursts into the left channel and Zappacosta nudges the midfielder to send him tumbling to the ground. West Ham have a free-kick in a dangerous position.
2' The Hammers win an early throw-in down the left flank and Antonio launches the ball long into the box, but the Blues are able to clear with ease.
1' We're underway at London Stadium.
The players are out on the pitch, so we should be underway shortly.
STAT ATTACK! Chelsea have lost three of their last six visits to West Ham United in all competitions (W3 D0 L3), losing in the League Cup and winning in the Premier League at the London Stadium last season.
STAT ATTACK! West Ham have won just two of their last 22 Premier League games against Chelsea (D4 L16), losing both matches last season 2-1.
FLASHBACK! Chelsea recorded a 2-1 win over West Ham in this fixture in the Premier League last season thanks to goals from Diego Costa and Eden Hazard. However, the Hammers did beat the Blues in the fourth round of the League Cup earlier in the 2016-17 campaign.
Chelsea have made one change to the side that drew with Atletico during the week. Marcos Alonso comes back into the side to replace Victor Moses, with Davide Zappacosta reverting back to the right flank.
Adrian keeps his place between the sticks for the Hammers, despite the return of Joe Hart. Moyes has made three changes from the defeat at City. Mark Noble and Winston Reid return to the fold to strengthen the spine of the team, while Marko Arnautovic starts behind Michail Antonio in attack. Andy Carroll and Javier Hernandez are back on the bench for the Hammers.
Chelsea subs: Caballero, Rudiger, Pedro, Moses, Willian, Batshuayi, Ampadu.
CHELSEA (3-5-1-1): Courtois; Azpilicueta, Christensen, Cahill; Zappacosta, Fabregas, Kante, Bakayoko, Alonso; Hazard, Morata.
West Ham subs: Carroll, Sakho, Hernandez, Ayew, Hart, Fernandes, Rice.
WEST HAM (3-5-1-1): Adrian; Reid, Ogbonna, Cresswell; Zabaleta, Lanzini, Noble, Obiang, Masuaku; Arnautovic; Antonio.
The team news has been announced and we'll start with the home side.
Chelsea were frustrated during the week in their 1-1 draw with Atletico Madrid, which forced them to settle for second place in Group C. A a result, they could face an elite team in the first knockout round, which could have consequences for their Premier League campaign. Conte will be desperate for his side to be more clinical this evening than they were on Tuesday night at Stamford Bridge.
Chelsea are slowly finding their rhythm in the Premier League, winning six out of their last seven matches. Their last defeat came at the hands of Crystal Palace at the beginning of October, but due to their sluggish start, the Blues are well off the pace of Manchester City at the top of the table. Antonio Conte's men cannot afford any further setbacks in their pursuit of City.
The Hammers have gone eight matches without a win in the Premier League and are three points adrift of safety in 19th place. David Moyes has not enjoyed success since replacing Slaven Bilic in the dugout, losing three out of his four matches in charge. This includes West Ham's narrow loss at the hands of Manchester City last time out. There were good moments for the club in the contest, but they were not good enough to claim a positive result, despite taking the lead through Angelo Ogbonna.
Good afternoon and welcome to the live commentary of the Premier League clash between West Ham and Chelsea at London Stadium.
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