White will be a big loss against the tough-tackling Pacific Islanders

The 28-year-old flanker needs further tests to assess the knee injury he picked up in the 48-6 win over Romania.

Scotland team doctor James Robson said: "The scan has revealed damage to some of the structures within his knee.

"Jason will now be getting a specialist orthopaedic opinion tomorrow (Tuesday). Following that assessment, the prognosis will be clearer."

Centre Rob Dewey is also a doubt for Saturday's match after suffering a knee injury against Romania.

Glasgow backs Dan Parks and Andy Henderson and the forward trio of Ross Ford (Borders), Alastair Kellock (Glasgow) and Simon Taylor (Edinburgh) have been added to Scotland's squad.

Skipper White was carried off in the Scots' opening autumn Test match.

"There was a scrum quite near our line and, as it broke up, Mike Blair set his sights on their number eight Ovidiu Tonita," White told the Sunday Times.

"I was then left with Valentin Calafetenau, the scrum-half.

"I thought he was going to break on the outside, but he ended up stepping back on to the inside, so I had to pivot.

"I have have never had much bother with that knee other than a couple of minor strains, so I am not in a position to judge the severity of this one."