Arsenal manager Mikel Arteta will be without Thomas Partey when they take on Benfica on Thursday night in the Europa League Round of 32 first leg.
The midfielder has struggled with injuries since his arrival at the Emirates, and Arteta revealed he will not be ready for the match.
The Gunners were however boosted by the return of Kieran Tierney, who traveled with the rest of the squad to Rome, ahead of the Stadio Olimpico showdown.
"Thomas didn't travel," revealed Arteat on Wednesday during his pre-match conference.
"He's not there yet, he's still training individually. Kieran has had one session with us and is part of the squad,"
The match will be played in Italy following travel restrictions involving travelers from the UK, with the second leg set to be played in Athens.
It's not a common occurrence for both matches to be played on neutral venues, and Arteta sough to pick the positives from the situation.
"Well, it's very unusual but we have to try to maintain the integrity of the competition as much as we can. The only way to do that at the moment is to play at different venues, but at least it's played over two legs with away goals always present,"
Arteta expects a tight contest against the Portuguese side, and he has prepared his side well for the clash.
"They will propose different problems in relation to what you said about the build-up phase. They can do that in many different ways and we have to be prepared for that and try to nullify that as much as possible, which is the same thing they will try to do with us,"