“Aalborg were lucky to get a draw at Celtic, but they will be at home against us and my old mate Bruce Rioch will have them fired up,” Ferguson said.
“They are playing Manchester United, they will have a sell-out crowd and the whole town will be up for it. Danish clubs are always battlers.”
United are favourites to win the match but only managed a goalless draw at home against Villarreal in their last Champions League match.
“Having dropped two points in our first game, it is important we get it right against Aalborg,” Ferguson said.
“Going to Villarreal for a win will be very difficult, and the last thing we need is to be going to Parkhead needing three points to go through.”
