I'm quite happy to pass on mbop,we are stocked if we get sanchez,this kid doesn't guarantee anything,he could turn out to be another whatshisname who was brought for huge money at the swamp,we know how that went,CB is more important imo
I think he could end up being the real deal. If we get Sanchez though, I don't see how adding Mbappe as well adds security which I don't think new fullbacks will be enough cover for. As much as I want to believe that Vinny is going to healthy, I'm not confident going into the season with the CBs we have. Mbappe's fee alone is probably enough or slightly lower than getting Sanchez and a solid CB. With that, I say just do whatever's possible to get Sanchez and get a new CB. That also leaves the question of who is going to rotate with Fernandinho and Yaya at DM.