Paris Saint-Germain's Champions League clash with AC Milan this week will see the French club come up against one of the many outstanding talents they have let slip away in recent years.
In the Italian side's goal will be Mike Maignan, who was allowed to leave Paris for Lille in 2015 and has gone on to win a Ligue 1 title, Serie A and become France's first-choice 'keeper.
PSG, meanwhile, handed the gloves to a long list of goalkeepers before signing Gianluigi Donnarumma from Milan in 2021 and making him their undisputed number one a year later.
But would the Qatar-backed club have ultimately been better off keeping faith in a young Maignan than going from Salvatore Sirigu and Kevin Trapp to Gianluigi Buffon, Alphonse Areola, Keylor Navas and then Donnarumma in their ongoing quest to win the Champions League?