Real Madrid midfielder Thomas Gravesen fears his career may be on hold until January if he does not move before the transfer window closes on Thursday night.
The 30-year-old will be allowed to leave the Bernabeu Stadium once clubs agree a fee with the Spanish giants.
Celtic manager Gordon Strachan remains hopeful he can complete a deal for the ex-Everton player.
But he faces competition from Everton, Newcastle, Bolton and Middlesbrough for the player's services.
Gravesen's agent, John Sivebaek, believes a deal can be concluded over the next 48 hours but the player himself is concerned he will not join a new club before he has to link up with the Denmark squad for the Euro 2008 qualifier against Iceland.
Gravesen said: 'It is in my mind there are five days left and I go into the Denmark camp on Sunday.
'I fear I will be stuck in Madrid not playing and doing the thing I love.'
But the Real man, who moved to Spain from Everton for around £2.5million in January 2005, admits his immediate future is the hands of the businessmen at the clubs involved.
Gravesen told BBC Sport: 'I am aware of his (Strachan's) interest. I am interested in going as well.
'But it is out of my hands now and it is down to the guys who do business side of things.
'I have had interest from Newcastle, Everton, Middlesbrough and Bolton.
'I am hoping something can be done. I want to find a way back to playing football.'
But Gravesen's agent insists the Hoops have a 'good chance' of landing the player.
Sivebaek told the Scottish Mail on Sunday: 'Everything is okay financially, although we have had quite similar talks with some other clubs.
'It now comes down to a decision club-to-club if they agree the transfer fee.
'There are still other clubs interested, but I think we will be getting a bit close within the next two days.
'We are working very hard on this.
'Hopefully, there will be a conclusion within 48 hours because Thomas has to join the national team.'