A last-gasp headed goal from Alex Song gained all three points for Arsenal as they eventually overcame a resolute West Ham to keep up with the pace at the top of the table.
For much of the match it looked like a combination of the woodwork and an impressive performance by the West Ham goalkeeper, Robert Green, would be enough to earn the visitor’s a valuable point.
Arsenal played well and deserved to win. Now they are Chelseas biggest challenge of the titel