Wales wing Shane Williams will miss the RBS Six Nations clash with France on Saturday after damaging knee ligaments.
The 34-year-old, who is Wales' record try-scorer, picked up the problem during his side's 19-13 win against Ireland on Saturday.
Williams is now faces a period of six to eight weeks on the sidelines with posterior cruciate ligament damage, although the Ospreys player will not require surgery.
"Shane will be out of action for a period of six to eight weeks after sustaining damage to the posterior cruciate ligament in his left knee during the match at the weekend," Wales' medical manager Prav Mathema said.
"Thankfully there is no need for surgical intervention and he will now undergo a period of rehabilitation which will see him return to full fitness."
If Williams carries out his plans to retire from Test rugby after this year's World Cup, he will now have played his last match in the Six Nations.
Either Morgan Stoddart or youngster George North, who has been added to the squad for the trip to Paris, will likely take Williams' place in the starting XV. No further call-ups are expected.