What CB out there is logical and would fit in? Bonucci and Laporte said no last year. Van Dijk is a no, Hernandez from Atletico seems off as they have a transfer ban and it seems all the players have too much respect for Simeone and the club to leave under those circumstances, can't see any defender coming from PSG/Real/Bayern. Jonathan Tah?
Depends if you want an established CB you'd have a hard time finding one if you want a young talented one there is plenty out there.