Arsenal boss Arsene Wenger says his side produced a quality game to ease past Dinamo Zagreb on Tuesday night.
The Gunners kept their Champions League hopes alive after an easy win against Zoran Mamic's side and know that they need a victory by two goals or by a margin of one if they score three goals in their next games against Olympiakos to make it through the group stage of the competition.
"We played at a good pace, produced a game of quality that we wanted," Wenger said.
"I believe the speed of our movement and passing gave Zagreb a problem. From then on, once we had scored the first goal you could see the chances were coming.
"It was important that we did not concede the first goal as we looked dangerous [going] forward. Overall we had a game of quality that we controlled well.
"What we wanted was to come out of this game with a chance to qualify and we needed to do the job and Bayern Munich needed to do the job and they did that well. It gives us a chance but how big the chance is I don't know. I believe we can do it.
"We just need to win [our next game].
"It might not be enough, but what I mean is if we go ahead 1-0 then they will be in a situation where they could lose it and we will be a situation in the game which we can win it, so we have to go there to win the game.
"If you can win 1-0, you can win 2-0. It is a must-win for us and the task is very clear."