Manchester United manager Sir Alex Ferguson believes that his side must play well against the "powerful" French champions Marseille if they are to progress to the Champions League quarter-finals on Tuesday.
Following a 0-0 draw in the Stade Velodrome in the first leg United are favourites to book a fifth successive last-eight spot although Ferguson insists the Red Devils will have to be on their game if they are obtain the right result.
"It is nice to have a bit of apprehension about big ties," he told reporters. "European games are always that way.
"It won't be any different tomorrow. We are playing a very experienced, powerful Marseille team. We will have to play well.
"I have watched them twice away from home against Monaco and against Rennes and they showed the qualities we will be up against.