Ronny Deila has said that he does not know what to expect from Dundee United when the teams meet on Sunday.
"They have changed the manager so it's not so easy to say how they are coming into this game," Deila told reporters.
"There's always a change when the new manager comes in. The club has been through a difficult situation but they still have talent in the side.
"It's going to be a difficult game. They have to fight to get points and we need the points to stay top of the league so it's going to be an exciting match on Sunday."