The report claims that the Cottagers, who are promoted to the Premier League, are eyeing a big-money move for the Belgian defender.
The 27-year-old joined Celtic from Manchester City in 2015 and has been ever present for Brendan Rodgers’ side. He is participating in the World Cup, and has produced some impressive displays.
He has 12 months left on his present deal and Rodgers is hopeful that he will sign an extension on his present deal.
The defender’s impressive performances during the World Cup have led to interest from several European clubs. Along with Fulham, Turkish and French clubs are monitoring his situation.
At this moment, Celtic do not want to sell him, but the report claims that the Bhoys could be tempted to cash in on him if he doesn’t agree to a new deal.
He has put contract talks on hold during the World Cup and Celtic now face a battle to keep him.