Arsene Wenger has confirmed Mathieu Flamini will sit out of Arsenal's Champions League showdown against Borussia Dortmund on Tuesday.
The Frenchman was forced off after a clash of heads with Alexander Tettey during the Gunners' 4-1 over Norwich on Saturday at the Emirates Stadium.
Flamini, who re-signed for Arsenal on a free transfer over the summer, rose to he is feet after the collision but was unable to continue and now Wenger has confirmed he won't be risked in the game at the Emirates Stadium tomorrow.
Arsenal go into the game on a high after they extended their recent superb form to 12 games unbeaten with the win over Norwich.
That includes wins against Napoli and Marseille in the Champions League that leaves them top of Group F going into tomorrow's game against last year's finalists.
Key to their form has been record signing Mesut Ozil, who scored twice against Norwich on Saturday.
However the German international was keen to praise the performance of his team-mates, and in particular Santi Cazorla, Olivier Giroud and Jack Wilshere for their part in the latter's stunning opener.
I've got to praise the three players involved for the first goal,” he told Arsenal Player. “It was real 'tiki taka' - almost like they were playing PlayStation! It was an unbelievable goal.
“I know that I can still improve but I'm happy with my display and the performance of the team. Aaron Ramsey showed that any player who comes on will do his best for the team and will get involved in tackles and attacks immediately.
“That's why we've been in such good form. I'm really proud of the team. We're taking what the manager wants us to take into games and are making strides. Now we've got another three points and can be pleased with that.
“[Confidence] is really high. We know what we can do but we won't get carried away. It's still very early but we know how much potential we have in the team. We just enjoy playing and it shows on the pitch. We fight for each other and we are always there for one another. That's why we've been so successful.”