Scotland's Chris Cusiter has failed to recover from a knee injury in time to play in the series opener against Argentina.
Robinson demanding his side perform for the full 80 minutes
Scotland captain Chris Cusiter has failed to recover from a knee injury in time to play in the first Test against Argentina on Saturday.
The scrum-half will sit out the game in Tucuman after missing the 24-5 victory over a makeshift Japan side at Murrayfield last week.
Having had little time to train alongside his team-mates, Cusiter is now focusing on getting himself ready for the second Test on June 19.
"I didn't train fully last week and I probably won't train fully this week until Thursday or Friday so it's too late for the first Test," he said.
Head coach Andy Robinson confirmed Cusiter would not play in the series opener and did not announce who would be handed the captaincy in his absence.
"Chris is out of the first match," the former England coach admitted. "I will announce it on Thursday, alongside the rest of the line-up."
Improving
Scotland have only won twice in their last nine trips to Argentina and were beaten 9-6 at Murrayfield in the last meeting of the two nations.
However Robinson - who saw his side manage just one win during a disappointing RBS Six Nations campaign - is demanding his players perform for 80 minutes against the Pumas.
"We are continuing to improve," he said.
"The game understanding is improving. Line-out was better in the Six Nations. The consistency of the performance have improved.
"The last time we played Ireland we played very well but it was on the back of four Test matches in which we played well only in part.
"Against Argentina last year, we played well in part but did not win the game."
