England through to quarter-finals of Sydney Sevens

England will face Argentina in the quarter-finals of the Sydney Sevens after pool wins over Kenya, Japan and series leaders South Africa.

Simon Amor's side came from behind to open with a 19-12 victory against Kenya at Allianz Stadium and followed it up with a comfortable four-try 26-0 success over Japan.

England trailed at half-time against South Africa and when Justin Geduld beat two defenders to extend their lead to 15-7, the Blitzbokke looked on course for victory.

However, England hit back with tries from Dan Norton and James Rodwell, who collected a crossfield kick to score a dramatic winner.

Elsewhere, New Zealand will face Fiji in a crunch quarter-final after going through the opening day of the World Sevens tournament unbeaten.

It will be another quarter-final between the two Sevens powerhouses after the Fijians beat them at the same stage in last weekend's tournament in Wellington.

New Zealand topped their pool after wins over Australia, Papua New Guinea and Scotland, while Fiji were shocked 28-15 by Wales in their group to set up the quarter-final with the Kiwis.

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Kiwi star Tim Mikkelson said the hot weather in Sydney had been challenging, with more heat forecast on Sunday.

"You need to get the ball to beat Fiji and if we can get the ball from the kick-offs we can make it a contest and really go forward on attack," said Mikkelson.

"Recovery is huge, hydration too. A few boys are cramping up and I hear it'll be even hotter tomorrow so we'll have to be even better."

In Sunday's other quarter-finals, Australia play Wales and the United States face South Africa.

The hosts qualified for the last-eight after finishing second in Pool C with victories over Scotland and Papua New Guinea.

"You saw what Wales did to Fiji today so we know they are a quality side," said Australia coach Andy Friend.

"We had a good win against them last week in Wellington but we also know that every game and tournament is different so they'll be tough tomorrow.

"We haven't been (in the final eight) in the last two tournaments so it's great to be back into that."

Canada beat USA in Women's final

In the women's event, Rio Olympic bronze medalists Canada defeated the United States 21-17 in Saturday's final.

Despite three tries from American Naya Tapper, it was late try from Canada's Bianca Farella that sealed the win.

The all-North American final was set up by two big upsets in the semi-finals. Canada beat Olympic gold medal-winning Australia 12-7 just after the United States, led by Leyla Alev Kelter's two tries, defeated New Zealand 19-12.

New Zealand beat Australia 19-0 for third place while England suffered extra-time heartbreak against Brazil in the final of the Challenge Trophy.