The German giants meet the Red Devils at Old Trafford in the quarter-final first leg tomorrow night and despite David Moyes' domestic shortcomings this term, Guardiola still feels it is a privilege to come up against such a club.
"The Champions League is not the most important title - the domestic league is - but it is the most prestigious.
"Now we are eight teams in the quarter-finals and every trainer and every player wants to win it - but it is not easy."
Bayern meet United at the Theatre of Dreams on Tuesday night before hosting the reigning English champions at the Allianz Arena on Wednesday April 9.
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