Last Updated: 19/10/13 11:15pm
A deserved victory for Man City, secured by the brilliance of Sergio Aguero. Stay with us for a full match report, stats, player ratings and the best post-match reaction.
Oliver blows for full-time. A first away victory for Manchester City this season and they're into the Premier League's top four.
City are appealing for a penalty as Toure breaks into the box and goes to ground under pressure from Reid, but Oliver is not interested.
Morrison attempts to trick his way to the touchline but only succeeds in running the ball out of play.
Hard to see West Ham coming back from here. They enjoyed their best spell after going 2-0 down, but pushing for the equaliser inevitably left more space for City's attack to exploit.
Aguero turns provider for City's third goal, finding Silva in the box and the Spain international cuts the ball onto his left foot before curling home.
Great play from Milner to win the ball in midfield, hold off Morrison and then feed Aguero. He passes to Kolarov but the move breaks down.
Clichy is in the right place at the right time to cut out Downing's cross, but concedes a corner, which City hack away.
Superb ball forward from Morrison is perfectly weighted for the run of Jarvis, he attempts to pull the ball back to Nolan on the edge of the box but cannot find his team-mate.
Silva finds a yard of space on the left of the West Ham box and then attempts a cross, but Reid is there to clear the danger.
Nolan attempts a spectacular overhead kick from Jarvis' cross from the right but fails to make a clean contact on the ball.
Play switches to the other end as Fernandinho forces his way into the area before Aguero takes over and curls a shot towards the bottom corner which Jaaskelainen pushes away.
West Ham make a double change with Joey O'Brien coming on for the limping Demel and goalscorer Vaz Te replaced by Matt Jarvis.
Superb play from Winston Reid, throwing himself of the way of a goalbound Negredo shot before getting to his feet to clear the loose ball.
OFF THE BAR!!! Negredo smashes a shot against the underside of the bar after being played in by Aguero. Jaaskelainen is beaten but the ball bounces out to safety.
Great improvisation from West Ham as Downing's header back into the box is flicked over his head by Morrison and Vaz Te executes a fine overhead kick to find the bottom corner of Hart's net. Game on!
Chance for West Ham, as Downing flicks through for Diame. Hart comes out to save bravely and the ball bounces off Nolan and then back over the bar. Decent response from West Ham to going 2-0 down.
Morrison gets away from Silva very easily and attempts a cross but fails to get the ball beyond Garcia the near post.
Speculative shouts of 'handball' from the crowd as the ball hits Garcia in the chest before he hacks away.
Clichy almost sells Hart short with a backpass, but the England keeper is able to clear with Diame closing in.
Shocking, shocking defending from West Ham and City took full advantage. Vaz Te was the closest player to Aguero, but was making no real effort to mark the City striker. That goal was almost gift-wrapped.
All too easy for Manchester City as Silva clips in the free kick and Aguero rises, unmarked, eight yards from goal at the near post to power his header beyond Jaaskelainen.
Lovely ball over the top from Silva towards Aguero, he nutmegs Reid out on the flank and then wins a free kick.
Noble clips the ball in towards Nolan, but the flag is up for offside. The West Ham man argues the decision, but replays show the officials were spot on.
Referee Oliver attempts to play an advantage after Diame is clattered by Toure, but then brings play back for a free-kick to the home side.
Man City deserve their lead at the interval, with Fernandinho's pass, Negredo's dummy and Aguero's finish all of a very high level. Joe Hart has not had too much to do, but West Ham have had their moments going forward.
GREAT SAVE!!!! Awful pass from Reid gifts the ball to Silva, who finds Toure, but his powerful shot is pushed away by the keeper.
City's defence is called into action as Downing stands up a cross to the far post, but Vaz Te cannot get a clean contact under pressure from Garcia and Richards.
Negredo clips in a cross from the right which Silva meets with his head and directs wide as Aguero was shaping to volley just a couple of yards behind him.
Diame robs Toure in the centre of the pitch and finds Vaz Te, he returns the ball to his team-mate who looks to break into the area, only to be stopped by Richards.
Clichy, Nasri and Aguero attempt to pass their way through the West Ham defence only to be kept at bay.
Great work from Negredo, turning away from one defender, muscling his way beyond a second before pulling his low shot across the face of goal and wide.
Lovely passing between Silva, Nasri and Fernandinho, before Toure's clipped ball into the area is headed away.
Pellegrini is on his feet, patrolling the technical area as City keep possession and look for another opportunity to strike.
Vaz Te is in the action again as he attempts an audacious overhead kick following a deep cross into the box, but it is well off target.
Good break and pass from Noble, but he was expecting Vaz Te to be breaking into the box, but the wide man was on his heels rather.
Noble takes it quickly to Morrison and he gets his shot away but cannot make Hart work with the ball flashing past the post.
A decent spell of West Ham pressure ends when Silva slides in rather late on Rat and receives an inevitable booking. Decent position for the free-kick for the hosts, out on the left-hand corner of the box.
Manchester City are certainly bossing possession at the moment, with 65 per cent of the ball so far.
Aguero runs at the West Ham defence from deep and goes all the way into the box before firing in a low shot which Jaaskelainen cannot gather at his near post before Demel hacks clear.
No obvious tactical switch from Allardyce yet, with West Ham sticking with their 4-6-0 so far, despite being a goal down.
Close to 2-0 to City, with Silva's lofted pass headed down by Negredo and Aguero given far too much time and space to shoot, but he can only fire straight at Jaaskelainen.
Lovely finish from Sergio Aguero as he was allowed to ghost through the West Ham defence and finish with ease beyond Jaaskelainen. The Hammers were left flat-footed by a neat dummy from Negredo in the build-up as he allowed the excellent through-ball from Fernandinho to run on to his team-mate.
West Ham regain possession and Diame tries his luck from range but his powerful shot from the left of the box is always curling away from Joe Hart's goal.
Silva swings the corner in but Nolan is able to clear comfortably before West Ham are awarded a free-kick in their own half.
Patient play from City as they look to find a way through West Ham's congested midfield and defence.
Hart is forced to whip out a fist and punch clear from Noble's clipped cross before West Ham force a corner.
City go back on the attack and a superb ball over the top of the defence from Aguero finds Negredo, but he cannot bring it under control and Jaaskelainen gathers.
Rat attempts to play a first time ball down the line from left-back but only succeeds in shinning it out of play. He's made a shaky start, so far.
Surging run from Micah Richards takes him into the West Ham penalty area but Noble slides in with a great tackle as he goes to shoot.
Final warm-ups and preparations for the players with kick-off just moments away as Allardyce and Pellegrini shake hands.
Time for the pre-match handshakes as the West Ham fans go through their traditional rendition of "I'm forever blowing bubbles."
Jamie Redknapp's view prior to kick off: "Sam Allardyce would bite your hand off for a draw right now."
Ian Ashman writes: "Hola. Greetings from an exiled City fan in Spain. I predict a 3-1 victory to my beloved Blues and expect Alvaro 'the beast' Negredo to continue in his rich vein of scoring goals."
Holly Savage says: "Not keen about Garcia playing and Zabaleta being on the bench but glad to see Richards back! Think City are going to win today, it's about time we got the away form going. Yaya Toure and Negredo to score for me, come on you Blues!"
Manuel Pellegrini has been speaking to Sky Sports and was asked about his selection policy following the international break and with the Champions League clash against CSKS Moscow on the horizon: He said: "We are thinking just about winning here. We have tried to pick the best team for today."
Duncan writes: "With West Ham having won their last game 3-0 away and with City having already lost to Cardiff and Aston Villa on their travels this season, I can only see a West Ham victory today! 2-1 West Ham."
It has been a mixed afternoon for the title challengers this afternoon. Chelsea and Arsenal enjoyed big victories over Cardiff and Norwich, respectively. Liverpool had to settle for a point away to 10-man Newcastle in the early game, while Manchester United's troubles continued as they drew 1-1 at home with Southampton.
Sam Allardyce has been speaking to Sky Sports about his 4-6-0 formation and said: "It hasn't got a false nine, that's for sure. Hopefully we can play as well as we did at Tottenham. There's no element of surprise now."
Happy Man City fan Jordan Green writes: "So glad that United have dropped points again at Old Trafford. City will win easily 0-3. Come on City!
More from Twitter as @laaurennkellyy writes: "West Ham to win 2-0. Ravel Morrison to score first. Come on you Irons!!"
Sam Allardyce sticks with the same starting XI from the impressive victory away to Tottenham last time out, which suggests midfielder Ravel Morrison will operate as the Hammers' most advanced player. What do West Ham fans think of the 'false nine' approach?
West Ham team: Jaaskelainen, Demel, Rat, Tomkins, Reid, Noble, Morrison, Diame, Vaz Te, Downing, Nolan.
Micah Richards makes his first Premier League start of the season for Manchester City this afternoon in a defence which also features midfielder Javi Garcia. What do you make of that, City fans?
Man City team: Hart, Richards, Garcia, Nastasic, Clichy, Nasri, Fernandinho, Toure, Silva, Aguero, Negredo.
Paul Greenwood - or @pally47 - tweets: "I'm taking the Hammers to turn City over today with a tight 1-0 win. Nolan the scorer."
Chris Green writes: "I would love West Ham to surprise us all and beat the former Premier League champions, but City possess a lot of fire-power on their travels and if they take an early lead, then it's going to be a big ask for the Hammers. We have witnessed many shocks at Upton Park in the past, and of course, the chances of one happening today look slim, but football is a funny old game, and anything is possible."
And if you fancy following my score and scorer prediction (I really wouldn't advise it!) then the odds on Manchester City to win 2-0 with Yaya Toure scoring first are currently 50/1.
Our friends at Sky Bet have a host of markets on offer on today's clash, with West Ham on offer at 9/2, Man City the strong favourites at 4/6 and the draw a 14/5 shot.
So, after digesting all that information, I'm going for Manchester City to win 2-0, with Yaya Toure scoring first.
Opta stat No.5: Yaya Toure, who has either scored or assisted in five of his seven league appearances this season, has scored three goals in four appearances against the Hammers.
Opta stat No.4: Man City have won just 46% of their Premier League games without Vincent Kompany since his debut; compared to 58% with him in the side.
Opta stat No.3: No side has seen more English players appear in the Premier League for them this season than West Ham United (9).
Opta stat No.2: Manchester City have lost just one of their last 12 Premier League meetings with West Ham (W8 D3).
Opta stat No.1: West Ham have kept four clean sheets in their last seven Premier League games; but have also failed to score in four of their seven matches.
If you want to get in touch to have your say on today's game or to discuss any matters relating to West Ham or Manchester City then drop me a line to email@example.com or via Twitter @skysportsrobp and I'll publish a selection of the best.
The team news will be announced around an hour before kick-off and we will bring them to you as soon as we have them.