Wenger revealed he was hopeful Vermaelen would soon be back.
"He's two weeks away. He is running out on the pitches," said Wenger.
"He looks alright but we have to respect the progression, you still have to give him two to three weeks to be competitive again.
"Basically we have Diaby, Vermaelen, Sagna and Wilshere out - the players who have had surgery - everybody else is available."
He also had updates on both Abou Diaby and Sagna.
"It is very good news," he said of Diaby.
"He's coming back in full training now so he is 10 days away to be competitive to play.
"All being well he should be available for the Carling Cup or the game before."
On Sagna he added: "He is down of course because when you are used so much to playing every three days and suddenly you are at home without any movement it is very difficult to take."