Arsenal came back from three goals down on Sunday to earn a draw against West Ham in the London derby.
West Ham leaped to a three-goal lead with J. Lingard (15) J. Bowen (17) T. Souček (32) in the first half.
But Alexander Lacazette netted a goal before the close of the first half.
Chambers forced an own goal of a brilliant cross from Dawson before Lacazette scored a superb header to draw level.