Barcelona enjoyed a comfortable victory in Greece last night.
Pedro scored twice for the Catalans either side of a Lionel Messi effort, the Argentinian capping yet another sublime performance with a goal.
"We've had to put in a big effort in order to win here," coach Pep Guardiola told UEFA.com post-match. "Firstly, I'd like to say this is the third year we've advanced from the group stage as section winners with a game to spare.
"Facing teams like Copenhagen and Rubin Kazan demands a hell of a lot. We're certainly not an unbeatable team.
"In terms of tonight's game, I'm a little disappointed with some things, like when we lost possession, but having said that we controlled the game apart from when [Djibril] Cisse had his chance.
"It could have been a different match had [goalkeeper] Victor Valdes not saved that; he continues to be a crucial part of our team.
"We're satisfied that we've qualified as group winners so let's see how we do in this tournament when February rolls around."