Ospreys scrum-half Rhys Webb has played his last game for the club after being ruled out for the rest of the season with a knee injury.
The Wales international, 29, who missed the Six Nations after undergoing surgery, will join French club Toulon in the summer.
"Rhys pulled out of Wales' Six Nations campaign and went on to have surgery on an ongoing knee problem," Ospreys said in a statement.
"He will be unavailable for the remainder of this season and his focus is now on getting his recovery right for next season."
Webb's switch to Toulon means he will no longer be eligible to play for his country due to a rule change, announced by the Welsh Rugby Union shortly after he had agreed a three-year deal with the French Top 14 side.
The WRU's new senior international selection policy means players taking up a deal with a team outside Wales must have won 60 caps to be able to play Test rugby.
Webb, who has made 28 appearances for Wales, announced his decision to leave Ospreys on October 10, less than two weeks before the WRU introduced its new rule.
At the time, the British & Irish Lion described the decision as a 'joke' and claimed he was not informed that a rule change was imminent.