Angelino, Mendy, Ake, Zinchenko are not good enough full backs for us at this time. Sad to see Mendys demise after he showed so much promise at Monaco and in his early days with us but injuries have left him a shadow of what we saw. Angelino in his brief appearance with us didn't show what we needed. He's gone on and done well so, let him stay. He's not good enough defensively. Ake is a centre back, we need a dedicated left back who can get crosses in as you see a lot of the ball as a city full back, and get back and defend the break but be technically proficient, it's a tough job under Pep. Zinchenko is a midfielder at any team other than ours, he's played attacking mid and defensive mid for his country and excelled as both he just isn't good enough to get in our midfield. Again, not a dedicated left back. In my opinion and they won't sell is Digne at Everton who I think, would fit our system well. I can't think of any others who would fit Peps system.