Francis Coquelin will be out of action until 2016.
Arsenal's worst fears were confirmed on Monday as Arsene Wenger ruled Francis Coquelin out of action for 'at least two months.'
The French midfielder was taken off after just 14 minutes in a calamitous loss away to West Bromwich Albion, with his replacement Mikel Arteta scoring a decisive own goal.
Arsene Wenger addressed the media at a press conference ahead of the club's Champions League match against Dinamo Zagreb.
The boss on Coquelin: "I'm always cautious. It will be at least two months but I don't want to speculate more than that." #AFCvZAG— Arsenal FC (@Arsenal) November 23, 2015
Coquelin has been a key player for Arsenal over the last year, and dealing without him will not be easy for the Gunners.
Just this time last year he was on loan at Charlton Athletic, before establishing himself as a key first team player at Arsenal.
The club's decision not to buy a defensive midfielder in the summer could well be coming back to haunt them, ahead of a crucial run of games in November and December, with the transfer window still weeks away.
Arsenal are currently in fourth position in the Premier League, while a win at home to Dinamo Zagreb tomorrow night is essential if they want any chance of qualifying for the knockout rounds of the Champions League.
Here is a look at how supporters reacted to the Coquelin injury blow...
Wenger says Jan isn't ideal time 2 buy cover 4 Coquelin. He's right. But the summer just gone where u signed no 1 bar a GK is ideal! #AFC— Scott McAuley (@toshenhoff) November 23, 2015