The Wisconsin Badgers suffered a big blow to their defense, as star linebacker Jack Cichy was lost for the season after tearing his ACL in practice Tuesday, coach Paul Chryst announced.

Cichy, a senior, will have knee surgery Friday.

"You hate it for Jack," Chryst said in a statement Thursday. "You only get so many chances to play this game and you never want to see a guy miss any of those opportunities. He's one of the leaders of our team and I know he'll be a big part of what we do moving forward this season."

Cichy has dealt with other injuries in his career, missing seven games last season after tearing a pectoral muscle.