In a tight game, the Hammers fell behind to an Adebayor volley on 67 minutes but were brave enough to come from behind to seal another famous victory over their London rivals.
With only 10 minutes of the game remaining Matt Jarvis hit a thumping drive to equalise for the Hammers before striker Modibo Maiga finally found the net with a far post header from a Mo Diame cross to send the travelling fans into raptures.