City pulled a goal back almost instantly thanks to David Silva's strike, but they were unable to find an equaliser as the Hammers held on for the points.
Read Sports Mole's minute-by-minute report below to find out how all of the action unfolded at Upton Park.
5 - Diafra Sakho is only the second player in Premier League history (after @mickquinn1089) to score in each of his first five starts. Nets.— OptaJoe (@OptaJoe) October 25, 2014
"You have to play for another 90 points, so there is a lot of time left to play. If we win at West Ham, maybe we can put some pressure on Chelsea because we play before them. But the issue for me, whether our game is early or late, is exactly the same. We have to play for another 90 points."
4 - West Ham have won four Premier League games so far this season. They didn't reach this tally until January in 2013-14. Improvement.— OptaJoe (@OptaJoe) October 25, 2014
"With Aguero, defenders think they have him marked but then suddenly, in a blur, he's moved the ball, shot and it's in the back of the net. Enner Valencia is a bit like that for us, hence the goal against Hull while Cristiano Ronaldo did something similar against Liverpool on Wednesday. That's what top players do, they take you by surprise. What do I tell my defenders to do? Pray, because some things, as hard as you practice, are unstoppable."
7 - Manchester City have lost the last seven Premier League matches that they have been losing at half-time. Mission.— OptaJoe (@OptaJoe) October 25, 2014