It took a huge blunder to gift Paris Saint-Germain victory in the first Champions League match of its post-galactico era.

PSG had over 60 percent possession and 24 attempts on goal but looked set to be left frustrated by their opponents at the Parc des Princes until a low Nuno Mendes cross squirmed under Gazzaniga and into the net in the 90th minute.

Having mostly convinced in league action so far – four wins in four games – Paris Saint-Germain’s first test of the European campaign against Girona came at a time when the customary early-season optimism was at its apex.