Worcester Warriors and Argentina hooker Agustin Creevy is likely to be ruled out until the new year due to injury.
Creevy underwent an operation to repair a meniscus tear in his knee earlier this week.
The hooker was assisted off the field in Friday's clash against Bath Rugby and is now set for a rehabilitation period before returning to action.
"Gus has been ruled out after he was forced off through injury during last Friday's match," said Worcester boss Dean Ryan.
"It's obviously disappointing that he will not be available to us as he has had a fantastic start to his Warriors career."
Creevy had been named in Argentina's squad for the upcoming November Internationals.