This was the night when, tossed by the waves, 2-0 down to Manchester City and staring at the threat of elimination from the Champions League, a young, new-look PSG team stood firm, dug deep, won big and quite possibly came of age.

Manchester City boss Pep Guardiola appeared resigned to the fact that his side were resoundingly outplayed by Paris St Germain in a 4-2 loss that leaves their Champions League knockout hopes in doubt -- a prospect that would have seemed unthinkable in recent campaigns.