Agath expressed his disappointment at the news in an interview with Celtic's official website.
He said: "It is not often that you get the chance to play in the quarter-finals of the UEFA Cup. I am sure the game will be something special. There is nothing I can do about it, I can't change it and there is little point in looking backwards. I have to look ahead, and hopefully the team will play well enough to get into the semi-final and maybe I can play in that one!"
