Arsenal midfielder Aaron Ramsey admits they can't slip up against Champions League opponents Montpellier.
Ramsey had admitted the clash with Montpellier is a must-win game.
After losing at home to Schalke last time out, Arsenal face a battle to reach for the knockout stages with Greek outfit Olympiacos a real threat. The Wales midfielder said: "The group is tight. We must win. We are at home, so hopefully we can do that and put ourselves in a strong position to qualify.
"But we know Montpellier can be a threat. It will be no push-over."
