Arsenal boss Arsene Wenger says "something special" was needed from his side to reach the Last 16 of the Champions League.
The Gunners produced one of their most impressive performances of the season as they eased past Olympiakos at the Karaiskakis Stadium on Wednesday night.
Arsenal could draw Atletico Madrid, Barcelona, Real Madrid, Wolfsburg or Zenit St. Petersburg in the next round but the Frenchman says the focus was all on beating the Greek champions.
"We had a perfect performance on the tactical and mental side too. Overall it was a real team performance," Wenger said.
"It is a fantastic achievement for us. When you look at who we've lost in the last three weeks, we've lost Coquelin, Cazorla and Alexis among other long-term injuries, not many people gave us a chance.
"We are a real team. In the dressing room this team is very close and you could see that again today.
"At the moment I haven't even looked at who we could get [in the Last 16].
"We were so nearly out that I put all my focus into staying in this competition. The kind of performance tonight, in a very heated atmosphere, showed that we have great character. These games make the team stronger and this one certainly will.
"It [the win] will make us stronger and strengthen the belief of the squad. It is a special night for us because, as we said before the game, we were in escape mode.
"We needed something special and when you deliver something special it can create positive memories for the rest of the season. Maybe it's a lucky year for us in the Champions League, you never know."
