All those are just assumptions.Cant say for sure.
But speaking presently this signing makes no sense taking age,cost,and the desired quality he would bring into the team(which is not much) into consideration.Depth/Squad rotation players should be like the last things on our menu.
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I might have assumed the cost part but still if you think he might be Pepe's replacement why do we even need one ? he's been literally proved redundant in this season,we're coping well in his absence as we have a lot of other depth options and besides we wont be switching to 4-3-3 anytime soon.