Arsenal manager, Mikel Arteta, could be without Leandro Trossard for their Premier League trip to Chelsea on Sunday.
Trossard picked up an injury as the Gunners beat Bayern Munich 3-1 in the Champions League on Wednesday night.
The Belgian headed straight down the tunnel at the Emirates Stadium after appearing to hurt his leg in the first half.
He was replaced by Noni Madueke, who went on to score Arsenal’s second goal to make it 2-1 in the second half.
Trossard is now a doubt for the crucial league meeting with Chelsea, as Arteta’s men seek to go nine points clear of their London rivals.
However, there was good news, as captain Martin Odegaard and Gabriel Martinelli made their returns from injury against Bayern.