Interim head coach Naca Cawanibuka described it as a "tough day at the office" while Captain Osea Kolinisau tweeted that he was "Proud of the boys. A good start to the season and we will come out stronger next week."
Fiji still had the most players named in the tournament dream team, with newcomer Setareki Bituniyata joining Kolinisau and Jerry Tuwai.
Fiji have been drawn in Pool B in Cape Town, alongside France, Kenya and Japan.