On that occasion, Juves game plan was simple but effective: provide crosses for Ronaldo.
Of even greater significance than Ronaldos remarkable aerial threat, though, is the fact that no other player has scored for the Old Lady in the knockout stage.
He scored a staggering 50 times for Madrid in the knockout stage alone. Its no coincidence then, that Ronaldo-less Real are already out of this seasons competition, while new club Juve are on course for the semis.
Juves dreadfully subdued second-half showing at Atletico – which Allegri admitted himself was "ugly" – provided the most compelling evidence to date that Sacchi may have been right.
The feeling is that its not that Juve cant cut loose, but that theyre not allowed to, and it is significant that the finest performance of Allegris reign was arguably last year's 3-1 win at the Santiago Bernabeu, where they had been left with no option but to attack after a 3-0 first-leg loss.
Of course, the Blaugrana had a once-in-a-lifetime generation of players who shaped and defined an entire era of football under the tutelage of Pep Guardiola. Zinedine Zidanes Real Madrid did nothing of the sort.
Thats all serial Champions League losers Juve want to be, having endured defeat in five consecutive finals.
So, while their teams play may not be beautiful, most Juve fans are unconcerned with aesthetics.
They wont care how they do it; as long as they do it.
As Juve legend Giampiero Boniperti famously said of the club culture, "Winning isnt important; its the only thing that counts."