(CBS) Blackhawks defenseman Michal Rozsival has a fractured left ankle and will miss the remainder of the season, the team announced Friday.

Rozsival suffered the injury in the second period of Thursday’s series-clinching win at Minnesota. The Wild’s Thomas Vanek skated past Rozsival, whose ankle bent awkwardly during a turn to make the play. Vanek’s shot was denied by Corey Crawford, while Rozsival remained down on the ice. Blackhawks personnel helped Rozsival off the ice.

“Michal Rozsival suffered a fractured left ankle during the second period of last night’s game,” Blackhawks head team physician Dr. Michael Terry said in a statement. “He will require surgery to repair it. He is not expected to return to full hockey activity until next season.”

The Blackhawks have advanced to the Western Conference Final for the fifth time in seven years and await the winner of the Ducks-Flames series. It’s unclear who they’ll use to replace Rozsival, who after an uneven season was playing some of his best hockey.