Jonah Lomu has played his last game for Cardiff Blues after breaking his ankle in the Celtic League win over Borders.
Lomu receives treatment on his ankle during the Borders game
The ex-New Zealand wing arrived at the Arms Park in September on a seven-month deal that ran until the end of May.
But the 30-year-old will miss the Blues' last four games of the season and now faces further rehabilitation.
Lomu's manager and wife, Fiona, said: "Specialists advised that Jonah will be out of action for about six weeks. He then hopes to begin light training."
Lomu has spent the season in Wales trying to resurrect his professional career following serious kidney problems and then shoulder surgery.
"Obviously Jonah is very disappointed. He has worked so hard to get his fitness and his game back during his time in Wales," Fiona Lomu added.
"This is a set-back for him but injuries like this happen all the time in rugby. Other than the ankle he's in excellent health and will be focused on getting right and preparing himself for the NPC season."
Lomu will return to play for North Harbour in the NPC after the Blues' season finishes, but will also be forced to miss part of the New Zealand domestic season as he recovers.
It is another blow for the giant wing in his bid to regain the heights that once made him the most feared player in international rugby.
The player had delivered his most impressive performance yet for the Blues as he made his first start since January.
But the New Zealand winger grimaced with pain as he fell awkwardly under a last-ditch Borders tackle which denied him a try.
Despite his obvious discomfort, Lomu still managed to get the ball away as he fell for Mark Lewis to score the Blues' fifth try in the 46-11 victory.
It is another blow for the Blues after back-row Andy Powell was also ruled out for the rest of the season after he broke his thumb in the same match against the Borders.
Powell's game lasted just 10 minutes as the number eight after being injured trying to charge down a kick.
Blues coach Dai Young said: "Andy has broken his thumb and looks like he will be out for at least six weeks. That means his season is probably over."
Blues face Newport Gwent Dragons on Wednesday night, then complete their league programme against Connacht, Ulster and Munster.