Bayern Munich and not Barcelona are widely regarded as the most dangerous team in European football.
That assertion was considered even before Bayern demolished the Spaniards in their Champions League meeting last season, and was taken as fact when the Germans went onto lift the trophy.
So a win against them, in any circumstance counts for something.
It can be the sort of factor to inspire a whole new set of results, another winning streak. Just ask Arsenal.
Going into the Allianz Arena last season the Gunners looked down and out. 3-1 down from the first leg and missing Jack Wilshere through injury, they had been beaten by rivals Spurs just days before.
Then suddenly they confounded everybody, by beating Bayern 2-0, only KO'd by the away goals rule.
Arsenal then were transformed, they had belief. Wenger's men went on an unbeaten run until the end of the season, clinching fourth spot and laying the foundation for the form this season which has taken them five points clear at the top of the Premier League.
The Gunners may want to look over their shoulders however.They visit Manchester City at the weekend, a team who have just had a dose of the magic potion which inspired Arsenal.
City defied the odds to come back from 2-0 down away at Bayern to win 3-2. Ultimately it may have been fruitless like Arsenal, as they still finished second in the group, but going forward it could be far more potent.
Their away form has been sketchy this season, losing at Sunderland and Cardiff City to name two. A win at Bayern will give them the confidence that they can indeed win anywhere.
It will make the team feel untouchable, especially given their faultless home record. Arsenal could catch them napping at the weekend, but City are likely to be on top of their game - and keen to cut the lead at the top to three points.
image: © dh87