West Ham 1-2 Arsenal: Sam Allardyce baffled by disallowed goal
West Ham manager Sam Allardyce is baffled by referee Neil Swarbrick's decision to disallow Alex Song's goal as Arsenal beat the Hammers 2-1 to move into the top five.
After Song's strike was disallowed, Santi Cazorla put the visitors ahead from the penalty spot, before Danny Welbeck put Arsenal further in front.
Cheikhou Kouyate's header gave the hosts hope but they were unable to avoid a second successive defeat.
The Hammers have won none of the past 13 Premier League games against Arsenal, losing the past eight in a row.