Dan Carter will liaise with New Zealand's medical staff to ascertain whether he requires surgery on the achilles tendon injury that has ended his season and his time in France with Perpignan.
The All Blacks fly-half was yesterday ruled out for around six months after sustaining a ruptured achilles in the final seconds of Saturday's 13–13 draw against Stade Français in Paris. He played five games for the Catalan club.
"Daniel Carter will continue with talks in collaboration with the All Blacks' medical staff this week to establish if the injury requires surgical intervention or not," a USAP statement said.
The match against Stade was Carter's first for three weeks. He had been suffering from an achilles problem for most of January. Carter is believed to be being paid around €700,000 (£615,000) from his half-year in France.
Perpignan's president, Paul Goze, said Carter was not rushed back to action prematurely for the match against Stade Français at the Stade de France, which was played in front of close to 80,000 spectators.
"I said to them that if it [his achilles] hurt, it wasn't imperative he played, even if it was against Paris [Stade Français]," Goze said. "At half-time, we again asked him and he replied that it didn't hurt."
Carter delivered his finest performance for Perpignan, seeing off Juan Martin Hernández in a duel between the world's two best fly-halves, although it was the Argentine's tackle that caused the recurrence of Carter's nagging achilles problem.
Perpignan's two other fly-halves – Steve Meyer and Nicolas Laharrague – are injured.
"I have been thinking since Saturday about bringing in a loan replacement," said Goze. "I have two or three ideas. But we aren't going to take on a player who is worse than what we have."
The New Zealand Rugby Union will support Carter throughout his rehabilitation. The 26-year-old was already due to miss the 2009 Super 14, having been given a six-month sabbatical from his NZRU contract.
"It's hugely disappointing for Dan," the All Blacks manager, Darren Shand, said. "He was really enjoying playing in France.
"He's getting fantastic support from the Perpignan team who have been really supportive and [are] keeping us well briefed. Dan's now resting at home in Perpignan and it's probable that he will need surgery but a full assessment will be made over the next few days.
"As a general rule of thumb, players who suffer a severe achilles injury are out of rugby for at least six months but it can be longer. Dan will return to rugby when he is ready and we will support him throughout his rehabilitation."