Brendan Rodgers has admitted there is transfer interest in Adam Idah - but ruled out any outgoings until players are signed.
The Parkhead boss stated no exits will be sanctioned until players are recruited to the Celtic squad.
Idah has been linked with a £7m switch to Swansea before the end of the summer window, but Rodgers cooled suggestions it's a done deal as he confirmed negotiations.
"There is interest in Adam," said Rodgers. "But no one can leave here unless we get players in to replace, it is as simple as that.
"There has been negotiations and chat about it, but I have to have players in here before I can consider letting anyone go."
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Further quizzed on departures, Rodgers admitted there has been interest in Yang but he is another player who has not yet been allowed to leave.
"I think for the likes of Yang it has been ongoing for him for a little while," he said.
"I understand it. When you are a player who has probably been used most as a squad player over a couple of years there comes a point in time when you maybe want to move on and play.
"But I have been unable to do that because we have needed Yang here. But I also know if he does stay, then he has a contribution to make.
"There has been interest in him, but I can't really do anything unless we have players in."
On whether there is a concern Idah will not be available to face Rangers this weekend, he said: "I'm quite relaxed on it, I just need to see where we are at over the course of the next couple of days, and we will assess it from there."
