It has been four years since Paris Saint-Germain completed one of the most blockbuster transfer windows in football history. Gianluigi Donnarumma, Achraf Hakimi, Georginio Wijnaldum, Nuno Mendes, Sergio Ramos arrived to reinforce Les Parisiens’ team following a season that saw them lose the Ligue 1 title to Lille. However, the biggest arrival came in the…