The Waratahs crushed an ill-disciplined Fijian Drua 38-14 on the Gold Coast at the weekend.
The Drua spent half an hour playing a man short after Nagusa was sent off for a late and high tackle on Tane Edmed.
Halfback Frank Lomani was then sin-binned for ten minutes for an illegal tackle.
The scores were 7-7 at that point, but the Waratahs punished the Drua immediately after both dismissals, piling on 24 points in the duo's absence.