Leeds United brought in an influx of new signings in the summer after the addition of Victor Orta.
Arsenal, Everton, Manchester City, Newcastle and Swansea defenders among the Premier League centre-backs Celtic could potentially sign.
Leeds United could have done with one of their former players this season.
Kyle Bartley enjoyed an extremely successful loan spell with Leeds United last season.
Kyle Bartley signed a new contract at Swansea City rather than returning to Leeds United this summer.
Swansea City defender Kyle Bartley played on loan for Leeds United last season.
Burnley and Leeds United are both said to have been tracking the Swansea City centre-back.
Leeds United shouldn't sign the Manchester United ace without an option to buy him outright next year.
Leeds United striker Chris Wood is being targeted by Swansea City among others.
Leeds United can't justify spending so much on another striker, not when they need another centre-back.