Rangers midfielder Niko Kranjcar has been ruled out for six months with a cruciate ligament injury.
Manager Mark Warburton confirmed the news on Wednesday, revealing that the Croat is likely to miss the rest of the season.
Kranjcar suffered the problem in training a fortnight ago and has travelled to London to undergo surgery.
"Niko is unfortunately suffering from an ACL injury," Warburton told reporters in a press conference. "He's currently having it reconstructed by one of the best surgeons down in London.
"It will be a six-month rehabilitation period for Niko. Everyone in the building is so disappointed for him. They know how hard he works."
As a result of the injury blow, Warburton has claimed that he may consider bringing in a replacement on loan in the January transfer window in order to boost the squad's "strength and depth".
The former Tottenham Hotspur midfielder joined Rangers from New York Cosmos in June.
