Thomas Young's Six Nations hopes have been dashed after the Cardiff flanker was ruled out for up to three months with a torn calf tendon.
The 30-year-old limped off during the Blue and Blacks' defeat to the Scarlets last weekend, prompting fears over his availability for Warren Gatland's Six Nations squad.
Returning coach Gatland names his squad next week, with Young's name likely to have featured given his outstanding form so far this season.