NEW Zealand's veteran captain Eric Rush admits his side need to improve 'four or five levels' if they are to win the Hong Kong Sevens.
After having to work hard for a 33-0 victory over Hong Kong, New Zealand - with Amasio Valence playing a key role - looked more fluid in a 26-0 win over Ireland.
The Pool D winners now face Argentina in the Cup quarter-finals.
'Our defence is not really a problem. The problem is in attack,' said Rush. 'We have to raise our game about four or five levels if we are to win this tournament.' Valence scored two tries against the Irish and was the Kiwis' main force in opening up opposing defences.
Commonwealth champions New Zealand have not won the Hong Kong Sevens since 1996, when their star player was the slippery Christian Cullen.
Matt Isaac starred for Australia with four tries in a 38-5 Pool C victory over Japan last night. It took his tournament total to eight tries.
But the Aussies had a scare against Papua New Guinea yesterday, squeezing out a 10-7 victory.
'We know what we did wrong and we can improve,' said Australian coach Glen Ella.
The Australians certainly face a big test in the Cup quarter-finals against Pool B winners South Africa.
The South Africans completed their group matches with a 28-14 victory over the United States and then defeated Canada 17-0.
The winners of the South Africa-Australia clash are likely to face the mighty Fijians in the semi-finals.