Saracens will miss the services of Scotland international Duncan Taylor for the remainder of the season after he ruptured both his anterior and posterior cruciate ligaments.
The 29-year-old sustained the blow during an A-team game against Exeter's reserve side on 3rd September and now is set to spend a lengthy period on the sidelines.
Taylor had a tough last season with injuries as his appearances for Premiership champions were limited to just 10 games in which he scored a solitary try.
Saracens director of rugby Mark McCall expressed disappointment on the news and is hopeful of him returning for Scotland's World Cup campaign next year in Japan.
"Duncan is out for the season and won't be back until June," McCall said.
"It's a huge blow. He's obviously had a poor year injury-wise. With the head injury (in January) he was never sure when he was coming back or when he was going to feel good.
"It's cruel for one of the most popular players in the squad. It's just one of those things.
"I'm optimistic he'll be back for the World Cup.
"All things going equal he'll be back in June which gives him time. I'm sure he'll be in contention."