The Gunners were dealt a major blow on 14 minutes when defensive midfielder Francis Coquelin was replaced by Mikel Arteta after being injured during a forceful 50-50 tackle.
However, the loss of the midfield powerhouse didn’t seem to immediately affect Arsene Wenger’s side, who took the lead 14 minutes later when Mesut Ozil’s free kick was met by Olivier Giroud, who headed home past Boaz Myhill.
Despite suggestions that Laurent Koscielny, Tony Pulis will be furious with his defenders, who wholly failed to deal with the powerful French forward.
Check out our Arsenal West Brom highlights below:
However, perhaps buoyed by the loss of Coquelin, the Albion fought their way back into the match and equalised when James Morrison fired home after a fine free kick from Chris Brunt.
(Video) Middlesbrough 1-0 QPR report & match highlights: Relive the last-gasp penalty DRAMA at the Riverside
(Video) Nice 3-0 Lyon report & match highlights: Hatem Ben Arfa inspires Aiglons to shock triumph
Atletico Madrid look to spurn Arsenal interest in talented Ligue 1 starlet
Things got worse for Arsenal at the end of the half, when Mikel Arteta directed the ball past Petr Cech to give Tony Pulis’s side the lead ahead of the break.
Will Arsenal be able to turn the tide in the second half? Stay tuned to Caught Offside for the reaction and the goals as they come in.