Virgil van Dijk claims he knows nothing of interest from English clubs and is keen to prove himself in the Champions League with Celtic.
QPR loanee Tom Carroll wants to "make it at Tottenham" but is prepared to consider all of his options at the end of the season.
Papa Bouba Diop has not been offered a contract extension to remain with Birmingham.
The midfielder has been signing one-month deals with the midlands club since first arriving at St Andrew's in October.
He penned his latest one in mid-December having capped his only start for City with a late equaliser to salvage a 2-2 draw against Crystal Palace just days earlier.
But a hamstring injury means he has not featured for Blues since and City boss Lee Clark is unable to offer him another extension due to the cash-strapped club's financial struggles.
Diop, 34, made one start and one substitute appearance for Birmingham.