Aalborg skipper Thomas Augustinussen is surprised to see Celtic cut loose Thomas Gravesen.
Augustinussen said: "I was surprised Gravesen didn't do well at Celtic.
"He's one of the best players ever to come out of Denmark and I thought the Scottish game was perfect for him.
"So it shows how good Celtic must be if Thomas couldn't get in their team.
"They have a good squad and we know it will be hard to beat them."