We were fantastic - Zetterberg

Despite falling behind to a Bernd Schneider strike on 20 minutes, the Greek side turned on the style crashing six goals past the helpless Bayer outfit.

"We played fantastic, everyone was on top of their game and came together at once," said Zetterberg to the Expressen.

"That was a typical display from us, we're either terrific or terrible."

The 31-year-old former Swedish international, who scored a superb curling free-kick goal in the tie, believes however Manchester United are still favourites for the group.

"We are putting pressure on the other sides now," added Zetterberg. "I believe Manchester United will win the group, but we can finish second.

"I plan to sign on for one more season. I am happy in Athens and wouldn't mind staying."