We'll play Walker, Rodri and Ferna at CB before the young lads I think. Can honestly see a scenario where we've got Rodri and Fernandinho as a CB pairing with Gundogan at #6 before we start Garcia or THB.
Doesn't worry me having Fernandinho replacing him.
Ferna has twice the tenacity and physically of Stones anyway - despite the obvious size difference.
If we are being fair - he has been not much more than average for the most of the calendar year. His peak at City probably came during his short spell at CB with Laporte early last season, but for the investment and faith put in him by Pep and the board - he's been hugely underwhelming.
In the odd game, no but Fernandinho is simply not a CB. I remember when Pep tried to play Fernandinho as a fullback once and he was totally abject. I just don't see Fernandinho playing as a CB for a prolong period of time ending well for us.