I feel sorry for ANY player who has their career ruined through injury.
It must be awful if you're a player like Mendy who had pace, power and athleticism to burn have it taken from you. He could've been one of the best in Europe, but that's impossible to see now. His pace allowed him to recover from brain-farts, similar to Walker.
I don't know the ins and outs of it, but Mendy needs to have a think about his career. If he wants money, it won't be at this club. If he wants to rescue a career, he needs to rethink his game. He should look at Zinchenko who has no pace, no power and little athleticism and wonder WHY he gets picked? The answer is that Zinchenko has thought about his game and what the team wants. Mendy still thinks he's 21 and can bomb about and fly into tackles. He isn't and he can't.
IF he rethinks his game, there's no reason why he can't be a decent squad player. Unfortunately, I've seen nothing in his game to suggest it. As a result, we'll end up letting him go for free but I don't see him ever coming back to "terrorise" us. I bet Walker and Mahrez would relish taking the piss out of him for 90 minutes!