Manchester United boss Sir Alex Ferguson admits he enjoys the mystery of European football.

"I always did like European football because there is a real variety about it," Ferguson said.

"Of course, I've had bad experiences in Europe as well as some very good ones but that just makes it all the more interesting.

"Take Aalborg, bossed by my old pal Bruce Rioch.

"They are playing Man United, they will have a sell-out and the whole town is up for it.

"If you look at form then we should really win the game but the beauty of European football is how teams change tactics and styles.

"So, it is in a situation like this that you have to draw on all your experience. I reckon I've been involved in about 150 games as a manager in Europe and I will have to utilise it."

As boss of the holders, Ferguson is determined that there will be no blips in the group stages.

He said: "I'll be fielding a more experienced team than I might do because I want to make sure this latest challenge goes according to plan."