Might take a while. Klopp won't throw them both on together - he might not play either straight away.
Me too but I don't think we will see Fab in midfield this season. If we had signed another decent CB to play LCB, then maybe (unless Davies proves me wrong!).
I imagine Klopp will want some time with both of them before he lets them into the team. Unless we have yet more injuries I expect to see a combination similar to the last few months for the time being.
If you've never in your life seen Ben Davies play please refrain from commenting on his ability If you have please justify your dissing of him before he's even trained.