West Ham secured their first win under David Moyes with a resilient 1-0 victory over Chelsea on Saturday.
An early goal from Marko Arnautovic and a strong defensive effort from the Hammers throughout kept the Blues at bay.
Victory elevates West Ham to within touching distance of moving out of the relegation zone, while Chelsea could be 14 points behind league-leaders Manchester City by the end of the weekend.
Here, Sportsmail brings you a round-up of all the things you may have missed from the London Stadium.
Derby day in full effect
Saturday’s lunchtime kick-off is the first of three huge derbies involving title contenders, alongside the Merseyside and Manchester derbies on Sunday.