Marseille coach Eric Gerets has urged his players not to underestimate Brann Bergen, should they meet the Norwegian champions in the third round of Champions League qualifying.
Brann are favourites to clinch a tie with OM as they will take a 1-0 lead into the second leg of their second-round qualifier against Latvian side Ventspils.
Gerets is satisfied with the draw, but believes his men still have a lot of work to do before they can start preparing for the group stages.
'If our opponents are Brann Bergen, who are Norwegian champions, that will not be an easy match,' said the Belgian.
'In my opinion, Brann are going to qualify. And it will be a difficult tie for us because in France, few people know about Norwegian football.
'We mustn't forget that they play well-structured football, with great discipline like in the English game. They play like a lot of French teams, with a 4-3-3 formation. It will not be easy but it could have been worse.'