Arsenal will be without Denis Suarez for Thursday night's Europa League quarter-final second leg against Napoli.
The news was confirmed via the club's official website this afternoon as the loan signing from Barcelona has remained in London for treatment on a groin problem which saw him miss the 1-0 win over Watford on Monday night.
"Groin. Stayed in London for treatment," a statement reads.
This comes just a day after it was hinted that the Spaniard could leave the Gunners when his loan spell comes to an end.
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"He has two years left at Barcelona. This year in England hasn't been his best," his agent Felix Gende told Neapolitan station Radio Kiss Kiss. "He has played little and hasn't been able to find a rhythm.
"At the moment, he's injured.
"He has muscle fatigue and an injury. We're awaiting the results from the exams.
"Napoli? The interest is always appreciated, being a team that has been fighting for the top positions for years.
"It's a bit soon to talk about the transfer window, but we aren't excluding anything."
There was also injury updates on Hector Bellerin, Danny Welbeck and Rob Holding, all of whom are expected to miss the remainder of the season.
Hector Bellerin
'Left knee. Continuing with gym based rehabilitation and strengthening post-surgery.'
Rob Holding
'Left knee. Progressing through end stages of gym rehabilitation and conditioning.'
Danny Welbeck
'Right ankle. Started on-field rehabilitation, conditioning and ball work.'
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