The 28-year-old, who has made 22 appearances in all competitions so far this term, underwent an MRI scan on Sunday morning at Dortmund's Knappschaftskrankenhaus hospital, where it was confirmed what had initially been feared when he went down in the fifth minute of the game against Augsburg.
Speaking to the assembled press after the game, BVB coach Jürgen Klopp voiced his concern: "We've only got bad news. For us this is a disaster, but more importantly it's terrible for Kuba." As a result of the injury, Blaszczykowski will go under the knife in the coming days in a bid to repair the damage. "Nothing throws me off my game that quickly," said the Polish winger after the encounter. "I'll give everything I've got to come back stronger than ever."
According to BVB's club doctor Markus Braun, should the operation and ensuing rehabilitation process go according to plan, the earliest Blaszczykowski could return to training is after the summer break.