Saracens back-row forward Will Fraser will miss the rest of the season after opting to have surgery on a long-standing back problem.
The 25-year-old, who has represented England Saxons, will undergo an operation on Tuesday.
"It's obviously disappointing but it's in everybody's interest to sort out these issues once and for all," Sarries director of rugby Mark McCall said.
"Will has plenty of great rugby in him - for club and country."
Fraser, who came through the north London club's academy, has made eight appearances for Saracens this season but has not featured since November.