The Gunners could get knocked out of the Champions League on Tuesday night if they fail to get a good result against Dinamo Zagreb.
The North London club also need to get back on track in the premier league in order to stay hot on the tails of the top 3.
However, they will have to do so without the services of Coquelin, after he limped out of Saturday’s defeat early in the first-hand of exchanges.
Arsene Wenger confirmed he is out for “at least two months” when he addressed media this afternoon, adding that it could be more but he “does not want to speculate” until he has seen the results of the scan.
To worsen the whole situation, his first half replacement, Mikel Arteta, also picked up an injury during the match at the Hawthorns and was taken off.
It’s believed that Coquelin’s scans have revealed extensive ligament damage and he is expected to be ruled out for the rest of the year, joining Danny Welbeck and Tomas Rosicky on the long-term casualties list.