There are four managers left in this season's UEFA Champions League who have won the competition in the past.
Somewhere along the line Louis van Gaal, Sir Alex Ferguson, Jose Mourinho and Pep Guardiola have all had their hands on the biggest prize in European club football.
Regardless of their team's relative merits, it is Dutchman Van Gaal who's had perhaps the most interesting (and the most turbulent) career of the four bosses.
He guided a brilliant young Ajax team to success in 1995, before being written off by many after he failed to repeat the feat with Barcelona.
In 2008/09 the Eredivisie title with AZ Alkmaar in his native Holland put him back on the radar of Europe's top clubs and Bayern are now enjoying the benefits of his school masterly style.
Is there still a place for his old-fashioned approach? He's been openly criticised by members of his own squad - among them Tuesday's matchwinner Ivica Olic. But their current position in Europe more than justifies Van Gaal's methods.
Van Gaal is fond of reaching for the hairdryer when he sees fit but his tactical nous and motivational ability were there for all to see on Tuesday night. So much so, it was Fergie left fuming at the final whistle after seeing his Manchester United side throw away the initiative.
At Barcelona, Guardiola represents the new generation, along with the likes of Leonardo at AC Milan, Laurent Blanc at Bordeaux: young managers who've been entrusted with top jobs despite precious little managerial experience.
But Bayern's 2-1 win shows Van Gaal still has a bit left in the tank. Even if Arjen Robben and Bastian Schweinsteiger return for the second leg, they still have their work cut out to go through, but the win over United must represent Van Gaal's best European result for several years.
Meanwhile Guardiola spent a lot of time outlining his admiration for Wenger in the run-up to Wednesday's 2-2 draw at the Emirates.
Arsenal may be short of trophies in recent seasons but for Guardiola, Wenger's greatest achievement is single-handedly changing the culture at the club.
Last season rumours abounded that Guardiola might soon move on from Barcelona: they say he finds the challenge of managing his own team emotionally exhausting.
Is it so unlikely that one day, he might manage Arsenal with Wenger as his director of football?
As for predictions for next week I won't be sticking my neck out: of the two British teams left in the competition, I think Arsenal will be knocked out against Barcelona while United will move into a semi-final.
Perhaps it will be Van Gaal's last hurrah on the biggest European stage. Although if Tuesday night's game is anything to go by, we'd be foolish to write him off again.
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