Should Leeds United ask about the Newcastle United man if Eliaquim Mangala or another defender arrives on Tyneside?
Newcastle manager Rafael Benitez has an important selection decision to make.
Both of Newcastle's centre backs clearly perform better alongside Jamaal Lascelles, who is now key to the club's success.
Arsenal, Everton, Manchester City, Newcastle and Swansea defenders among the Premier League centre-backs Celtic could potentially sign.
There are likely to be a number of changes to the Newcastle team as they take on Manchester United at Old Trafford on Saturday evening.
The Newcastle United defender may be back in the starting line-up earlier than he had envisaged.
Should Celtic try and sign the Newcastle United defender in January?
The Newcastle United man's place could be in jeopardy at international level.
Newcastle United won against West Ham United in the Premier League on Saturday.
Celtic should consider the Newcastle United centre-back.
The Crystal Palace-linked boss can count Newcastle United boss Rafa Benitez among a vast network of contacts, having worked with the Spaniard at Liverpool.
Surely Ciaran Clark deserves a place ahead of Newcastle United team-mate Jamaal Lascelles in Mick Quinn's Championship Team of the Season ?
The 26-year-old centre-back proved decidedly error-prone during his time at Aston Villa, but the form he showcased two seasons ago offers reason for optimism.