Manchester United’s defence is undergoing an overhaul this summer but it was the goalkeeping department that underwent an open heart surgery last summer. Andre Onana and Altay Bayindir came in and out went David de Gea and Dean Henderson as it became a unique summer where they club changed both, the No. 1 and No. 2. Amidst the hoopla of signing Onana before it was eventually agreed, United had almost settled on signing a player that many hadn’t heard of. It reminded many of the signings of the likes of Patrice Evra and Nemanja Vidic, who weren’t well-known quantities but became legends at Old …