Kurtley Beale is expected to get the green light to keep his Waratahs place for the clash with the Jaguares.
Beale is nursing a rib cartilage injury that caused him acute discomfort in last week's 24-24 draw with the Sharks. But assistant coach Simon Cron expects him to be available for the Buenos Aires game.
"He's looking pretty good at the moment from what I've seen," said Cron. "We trained Tuesday and he ran OK; I think he'll be fine from what I'm looking at.
"Kurtley is a livewire ... having him playing is always better than not and losing him on the weekend the boys transitioned pretty well with him off. My understanding is he's doing pretty well."
NSW have flown fourth-string halfback Nick Duffy to Argentina in the expectation of handing him a Super Rugby debut. But reserve halfback Mitch Short, who scored a try on his debut in Durban, has been flown home with a small ACL tear.
No. 9 Jake Gordon passed a Head Injury Assessment in the second half against the Sharks but is still not certain to play.
Duffy landed in Buenos Aires with just three days to prepare for his bow after NSW opted not to send for Nick Phipps as he's still struggling with a calf problem.
Cron added: "Duff takes things in his stride, he doesn't get flustered too much. I think he's pretty excited about the whole scenario."
If Gordon is ruled out, Cron feels back-rower Will Miller would be the player to step up as an emergency replacement.
NSW are 17/25 to beat the Jaguares, who are 6/5. The Jaguares are 10/11 with a 3.5-point start.
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