Ledley is out of contract at Crystal Palace this summer, while West Brom are said to be looking at free agent midfielders.
The Welshman has struggled for game time at Crystal Palace this season but a return to Celtic could kick-start his career.
The Eagles are staring Premier League relegation in the face, and these players haven't helped matters.
The Eagles goalkeeper sustained a knee injury on international duty.
Crystal Palace midfielder Joe Ledley has urged the fringe players coming into the squad to impress when the Eagles take on Southampton.
As Celtic prepare to face Barcelona in the Champions League, we look back at one of their most famous European nights.
With all signings complete, Crystal Palace will look to a group of new players to kick-start their season.
Aston Villa are reportedly keen to sign a midfielder from Crystal Palace.
Joe Ledley will not dance in Cardiff.
Wales were knocked out of the European Championships by Portugal in the semi-finals in Lyon.