I would imagine it's Wee Dave who will be the player most likely to lose game time should we sign this kid or Fernandes.
Mahrez would also suffer, of course, but he is not doing enough currently, to even merit coming into an argument as an alternative. He'l just have to put up with whatever happens.
If we are looking at this lad or Fernandes, then if we did get one, they would have to play regularly.
Neither really replace Gundogan in the squad, as his job is he he sometimes replaces DS or sits in for Fernandinho.
Surely it's DS attacking mid position under threat from either of these, plus Foden, who has to play more also ?