He said: "It was just disappointing because all summer I'd tracked him. I know what happened but at the end of the day I've lost a really good midfield player.
"If anyone's heart is not in it then we all know we are going to be up against it. If anyone is not ready for the challenge they may as well not be here and that was what our thoughts were.
"It was a horrible end because a lot of people did a lot of work on the deal. It was sad but the plain fact is he didn't want to be here."