Their second consecutive win in Europe leaves the Gunners top of Group B, and has also lifted the team after their 2-1 defeat to Chelsea last Saturday in the Premier League.
The scoring was opened by Gervinho, however Arsenal’s grip on the game quickly faded and Kostas Mitroglou equalised for the Greek champions just before half time.
Arsenal controlled the second half and goals from Lukas Podolski and Aaron Ramsey secured the win for Arsene Wenger – watching from the stands due to a touchline ban.
In a post-match interview with Sky Sports, Vermaelen said: “I think it gives us a lot of confidence, six out of six [points] and that’s really important.”
The Belgium international was eager to address his side’s conceded goal.
“In the first half we were sloppy sometimes with passing, we lost a lot of balls.
“We started with a high tempo and that was great but then we dropped a little,” he said.
However, the Arsenal defender was pleased with his team’s result. “The most important thing is to win your home games in the Champions League. We want to keep it going.” he added.