Fiji head into the Singapore sevens this weekend fresh off a comprehensive Hong Kong tournament victory.
Fiji is currently second on the series ladder with 122 points, with the Blitz Bokke 23 points ahead.
Teams receive 22 points a tournament win, the runner-up gets 19 and the third place team is awarded 17 points.
Gareth Baber said this means South Africa will have to drop their standards signifcantly for Fiji to have a chance.
"They have been a model of consistency throughout the series," Baber said.