Quoted from football365.com:
Wenger confirmed he expected Vermaelen to feature at
Everton, but that Walcott, on the bench in Amsterdam last night,
would need some more recovery time from a slight back
problem.
The Gunners boss, however, revealed number two keeper Lukasz
Fabianski is set for a spell on the sidelines after needing knee
surgery, while defender Johan Djourou is also out.
"We have some problems," Wenger told Arsenal TV Online.
"We have Theo Walcott, who is not available. [Abou] Diaby has a
little groin problem, but he could be available.
"[Also] we have lost Johan Djourou and Lukasz Fabianski because
they had injuries.
"Lukasz had a cartilage surgery. He will be out for two
months.
"Johan has a knee problem that will take some time to cure - one
month.
"Thomas Vermaelen played 45 minutes for Belgium last night and
came through okay so he will be available."
Wenger feels both Rosicky and Nasri are rehabilitating well.
He said: "Tomas Rosicky is two weeks away," said Wenger.
"Samir Nasri [is out] three-and-a-half weeks now, but it will be
six or seven weeks until he is available for training."