Edouard Mendy, like Kai Havertz, and to some extent Christian Pulisic, Hakim Ziyech, Thiago Silva and Ben Chilwell, is now working under his third Chelsea manager despite joining the club in the summer of 2020.
He was pioneered by Petr Cech's recommendation and esteemed goalkeeping coach Christophe Lollichon, those two have also left the corridors at Stamford Bridge one way or another. Frank Lampard, surplus to say, is also not at Chelsea anymore, neither is the lady that will have most likely prepared the contract and negotiated a remarkable price for Mendy, Marina Granovskaia.
It's fine because the manager who helped the Senegal stopper to win the Champions League is still...wait, no. It's now Graham Potter. His own goalkeeping exploits with Robert Sanchez are impressive, but Mendy is only just getting over Lampard leaving, let alone the other key influences around him.