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.
Bolton have signed West Ham forward Robert Hall on loan until the end of the season.
The striker, 19, who can also operate as a winger, is available to Trotters boss Dougie Freedman for Saturday's trip to Charlton.
England youth international Hall spent time with Wanderers' npower Championship counterparts Birmingham earlier this season, where he played 13 games, including the full 90 minutes in a 3-1 December defeat at the Reebok Stadium.