Bernd Leno's red card against Wolves means he will be suspended for Saturday's Premier League trip to Aston Villa.
Alex Runarsson came on as a late substitute at Molineux and made a number of saves, but he faces competition from Mat Ryan if our new goalkeeper recovers from injury.
"Mat had a muscular issue and in the last two days he hasn’t been able to train," said Mikel Arteta after Tuesday's game.
"Hopefully we can get him back in the next few days."
Kieran Tierney also missed the game at Wolves, so could he return at Villa?
"He wasn’t close at all [to playing on Tuesday]," said Arteta.
"Hopefully in the next few days he feels much better and he can come in the team and help us in this moment where we have so many games."
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