With Keane off, we need to find a player who can play full back and centre back similar to
O'Brien.
I would look at Callum Doyle who was on loan at Norwich from Man City. Highly rated who can play left back and centre back.
Played 40 apps for Norwich and only 21 who has played for Leicester, Sunderland and Coventry on loan so he might be looking to move permanently.
City might just cut their ties because he faces a uphill battle breaking into their first team plus he has been left out of their World Club Cup squad and England Under 21s.
Hopefully James Smith being brought in could help grease the wheel on this deal.