Kris Commons is "taking a risk" by holding out for a better contract at Celtic, according to boss Ronny Deila.
Speaking after scoring in the Hoops' 4-3 Europa League Group D defeat at Dinamo Zagreb, the 31-year-old midfielder claimed the new deal offered by the Scottish champions was unacceptable.
The midfielder (pictured right), out of contract in the summer, admitted the length of the deal was a sticking point and added: "If they want me here, they'll keep me here."
When pointed out to Deila that Commons seemed to be clear on what he was looking for, the Norwegian said: "Yes, but then he is taking a risk.
"Negotiation is to try and get an agreement. Everyone has to give and take and we will see what happens.
"It is the same every time we want to sign somebody or we want new players in. It is normal procedure.
"We haven't offered him one year.
"Peter (Lawwell, chief executive) is talking with his agent and talking about the structure in the contract and that's where are now.
"And when you get older, it is more risk for the clubs to take longer contracts and it is also to keep them (players) hungry, which is also important. I have influence on it, we are doing this together.
"We have a club to take care of and we are going to try to improve the team and see what is the best. I talk to Kris a lot and we have a good relationship.
"He is a good football player. Everyone saw what he can do yesterday, he scored a goal and had a good free-kick. That is fantastic. We have to keep on and see if we agree."
Asked if he was confident of a resolution being found, Deila, speaking at Celtic Park ahead of tomorrow's home Scottish Premiership clash with St Mirren, said: "You never know in negotiations and it is also about what can we get.
"This is something we have to look for in the future but he is a good player."