New Zealand beat Fiji 21-12 in the cup final at the George Sevens on Saturday while the Boks faltered.
New Zealand controlled most of the first half and went into a 7-0 lead at the break.
The Fijians did well to get back into the game in the second half, but the Kiwis’ three tries to Fiji’s two sealed the win and secured the main prize.
New Zealand now have a healthy lead at the top of the World Series log with 48 points after consecutive cup wins, with Fiji second on 36 points.
Meanwhile, the Boks’ unimpressive World Series title defence continues, as they find themselves eighth on the World Series log on 16 points.
They had a bad opening tournament in Dubai as they finished second in the plate section and suffered the same feat in George.
After recording a 10-7 win against Samoa in a scrappy semi-final, Paul Treu’s men then produced a tired effort against England in the final, losing 21-7.
England had the clear upper hand in the first half as they easily outran a poor Bok defence and scored two converted tries for 14-0 lead at half-time.
The Boks continued to disappoint in the second half as they found themselves 21-0 behind when England scored another seven-pointer against the run of play.
Shaun Venter grabbed a consolation for the home side as he scored a last-minute touch down.
Earlier on day two, the Blitzboks suffered another cup quarterfinal exit as they lost 21-17 against Fiji.
Their inability to secure possesion at the breakdowns and lack of compsure in attack cost the home side as Fiji scored most of their tries thanks to errors from the Boks.
The home side dominated possession in the early exchanges and did well to work themselves into Fiji’s 22, but were unlucky when William Ryder scored against the run of play after an intercept break.
Marius Schoeman brought the home side back into the game with a good run into space, but Fiji extended their lead with another converted try and went into the break 14-5 ahead.
Early in the second stanza, it got worse for the Boks when Fiji broke through down the touchline to cross the chalk after stealing the ball from the set-phase in their own half.
A late brace from MJ Mentz created an intense finish as they Boks trailed by four points with a minute remaining.
South Africa, however, struggled to keep possession and conceded a penalty at a breakdown on the full time mark. Fiji cleared the ball into touch for a hard-fought victory.
The next tournament is the Wellington Sevens in New Zealand on 5 and 6 February.
George Sevens day two final results:
Shield final: Scotland 28 France 19
Bowl final: Wales 14 Russia 5
Plate final: South Africa 7 England 21
Cup semi-final 1: New Zealand 17 Kenya 14
Cup semi-final 2: Fiji 19 Argentina 14
Cup final: New Zealand 21 Fiji 12
By Gareth Duncan