After a brilliant run of form, West Ham were left reeling by an utterly dominant performance by Chelsea. Sam Allardyce left out a few key members of the side with an eye on today's game. Time will tell whether or not that was the correct decision to make; what we certainly do know is that West Ham need a big performance to prove their top four credentials.
As for Arsenal, they have won the last eight fixtures against West Ham. They have also lost only once in their last six Premier League games. However, they too have something to prove after their worst ever Premier League start to a season has left them playing catch up for a place in the top four.
Team sheets below: