Arsenal midfielder Mesut Ozil is confident the Gunners can overcome a hostile atmosphere in Greece and qualify for the knockout stage of the Champions League with victory over Olympiakos on Wednesday night.
The Premier League outfit currently sit in third place in Group F, but can leapfrog Olympiakos into second place with victory by two goals or if they can score three and only win narrowly.
"It will be very, very hard," Ozil told Arsenal Player.
"Olympiakos can play good football and we saw that at the Emirates. They want to play on the counter-attack but we can't concede goals like we did before again.
"The fans will be behind them and our goal has to be to beat them. I have played in Greece before. I know that there will be a very good atmosphere, the fans are crazy and they really support their team right through the full 90 minutes.
"We have to be focused on the game, we have to give a really good performance.
"It is possible to win there with two goals in our favour and that's what we want to do. We have to really give everything so that we can achieve this and get through to the next round."