Arsenal manager Unai Emery hopes he does not have to add Shkodran Mustafi to his growing injury list.
The German was forced off towards the end of Sunday's 3-1 loss to Manchester City.
Injuries to fellow centre-backs Sokratis and Rob Holding have been troublesome for the Gunners, but Emery thinks Mustafi will recover quickly.
"I think he's okay also," Emery said of the German defender.
"He's been having problems all this week and last week. Dinos Mavrapanos is training with us also and is good to start his first 20 minutes today and help us."