Charlton manager Lee Bowyer has meanwhile revealed that three players have said they will not play when the Championship resumes.
Lyle Taylor, and Chris Solly, both out of contract, and David Davis, on loan from Birmingham, will refuse to return to action.
Galatasaray have joined Rangers in the chase for Taylor as he prepares to quit the Valley.
Rangers have been tracking the Charlton contract rebel, whose deal runs out on June 30, for some time – but now Turkish giants Galatasaray have also expressed an interest.
Bowyer has said he understands the player’s point of view, with a possible big move as a free agent coming up.
He said: “Lyle’s one of them and that’s tough for us, that’s tough for me as the manager.