Bayern Munich has ripped off seven wins and seven clean sheets in a row since a Champions League calamity at Barcelona. The resurgence has fans wondering: just what has been in head coach Vincent Kompany’s secret sauce to spur this turnaround?

Four years ago, in 2020, Bayern Munich beat Paris Saint-Germain 1-0 in the Champions League final. Tonight, they meet for the third time since. Those four years — an Olympic cycle, a World Cup cycle — is a period of time that lends itself to assessing how the two clubs, which share as many similarities as differences, have changed.

Bayern Munich coach Vincent Kompany said he had yet to fully understand how the new Champions League format worked after his team earned a hard-fought 1-0 victory over Paris St Germain on Tuesday to improve their chances of reaching the knockout stage.