The Hammers went into their clash with Chelsea on Saturday as underdogs as they searched for their first win since David Moyes' appointment and first in the Premier League since September, and were coming up against a Chelsea side who had been brilliant leading up to the contest.
But the Irons turned the formbook on its head as an early goal from Marko Arnautovic gave them a 1-0 win that will give their confidence a huge boost ahead of the busy Christmas period.
Given how important the victory was, the West Ham players would have been forgiven for revelling in the win for a while. But Ogbonna's post on social media earlier this week shows that they have absolutely no intention of resting on their laurels as they look to get themselves out of trouble in the table.
It will certainly be a tough ask for Moyes' men to make it two positive results in a row as they face an Arsenal side that will be looking to try and break into the top four.
Arsene Wenger's men were poor at Southampton for large parts and were relying on a late header from Olivier Giroud for their equaliser, so the Hammers can certainly be optimistic that they can potentially upset the apple cart once again.
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