Arsene Wenger has said that Arsenal need to guard against complacency in their Champions League Group F match with Marseille.

The Gunners will be confident of a win against the French side, who are yet to claim a point in the group, but Wenger believes that his team will endure a tough night at the Emirates Stadium.

"[Marseille] have nothing to lose and that always makes the French teams very dangerous," UEFA.com quotes the manager as saying.

"They have quality and they are in a better period because they won their last two games and that makes them a dangerous team to play against. The quality of our concentration and our focus will be vital tomorrow.

"If you do the job well you qualify and you finish first you can say 'OK we have done our job like we wanted to do it'. Our interest is to finish first. Don't worry, we won't neglect that if we have the opportunity to do it, but first go step by step – let's qualify and if we can do that then let's finish top of the group."

Arsenal moved top of their Champions League group with a 1-0 win over Borussia Dortmund in their last match.