The Belgium international completed his move to Camp Nou on Saturday, rejecting the advances of Manchester United, though that has left the Gunners short on options at the back.
With Laurent Koscielny picking up a knock in the Community Shield victory over Manchester City, and Per Mertesacker having only just returned to training, Wenger is ready to bring in further cover at the heart of his defence.
“Vermaelen behaved outstandingly last year - I am grateful for him and I wish him very well,” said the Arsenal boss after his side romped to a 3-0 win at Wembley.
“If I can find another centre-back I will do it. You make your position with your performances.”
Calum Chambers, a £16 million summer signing from Southampton, once again featured at centre-back, helping keep a deadly City attack at bay, and Wenger was hugely impressed by the teenager, as well as Mathieu Debuchy.
“For a 19-year-old, he had an outstanding performance today,” added the veteran boss. “He was very impressive. Debuchy was excellent.”
Both players are in line to start the Gunners’ opening Premier League match against Crystal Palace at Emirates Stadium next week.