Hoffenheim general manager Ernst Tanner claims an agreement could still be reached with Blackburn for Vedad Ibisevic.
Rovers have been tracking the striker for some time, with Steve Kean having made the acquisition of a goalscorer a top priority.
He was keen to have a deal done last week, claiming on Friday that he was only prepared to wait a further 24 hours for an answer from the player.
No transfer was completed, but Hoffenheim claim a move could still be pushed through before Wednesday's deadline.
Tanner said: "Vedad Ibisevic is from Bosnia and he holds a passport from that country.
"Bosnia are not an EU country and you need a valid visa to play in England if you are not an EU citizen.
"A visa application is in progress but it has not yet been granted.
"Ibisevic needs to be ready for a transfer on Wednesday if this deal is to be pushed through. We have three days left to sort out a few more details.
"If all parties want to make this deal happen, we will reach an agreement. But we are some way off the moment."