It is Fiji v Britain in Final
Fiji were in cruise mode as they beat a hopelessly outclassed Japan 20-5.
The British team made was to scramble and work to the bitter end for a 7-5 win over South Africa in a nail-biting affair in the other semifinal.
Fiji will make history, regardless of what happens in the Final, as they will win silver or gold - their country's first-ever medal at the Olympics.
South Africa will play Japan for the bronze medal.
New Zealand will face Argentina in the fifth-place play-off - the Kiwis having beaten France 24-19 and Los Pumas beating Australia 26-21. France and Australia will battle for seventh place.
We look at all the semifinal action!
Semifinals:
Fiji were looking comfortable as they opened the scoring the first semifinal, against Japan. Semi Kunatani drew in two Japanese defenders, leaving Vatemo Ravouvou with ample space down the right wing to score.
Try-scorer Vatemo Ravouvou was then sin-binned a shoulder charge and the Japanese made the most of the extra man. Teruya Goto spotted the space out wide and Fiji could not stop him.
Fiji showed why they are back-to-back World Series champions. Josua Tuisova put his foot on the gas on the outside, leaving Masakatsu Hikosaka grabbing at thin air. It was a vital try just before the break.
The Fijian flair was on display in it's full glory - as Jasa Veremalua ate up the metres, transferring the ball from one hand to the other to shake off defenders. With his offload he found Semi Kunatani and Fiji charged further ahead.
This second-half was all about the Fijian flair and Ben Ryan's side looked supremely confident.The tries are being beautifully worked and the full-time whistle Fiji guaranteed their country its first-ever medal in Olympic history.
In the second semifinal Britain had the opening penalty and a chance to set up a score, but the ball went loose. Rosko Specman picked up and charged up the field before he was caught by James Davies. The South Africans maintained possession and continued their charge - with Kyle Brown scoring the first points of the match.
Both teams had their chances in the half, but desperate scramble defence saw runners on both sides brought down deep into the opposition 22.
Rosko Specman was looking dangerous for the BlitzBoks, as he sprinted up the middle of the park - but was caught by Dan Norton. It was catching, because the British team also missed out at the other end and it remained a single score game at the half-time break.
It was a piece of individual brilliance from Dan Norton that got Britain in front. He showed one of the best steps in the competition and once he was free he headed under the posts. Tom Mitchell added the conversion.
South Africa were made to pay for their high error count, as the Norton magic and Mitchell conversion proved to be enough in a tight and tense affair - the BlitzBoks coughing up the ball on more than one occasion.
The British held on and will face Fiji in the Final.
Results:
Fiji 20-5 Japan
Britain 7-5 South Africa
Fifth- to eighth-place play-off:
DJ Forbes made the first significant break and set up Regan Ware for the first try. However, the lead didn't last long, as Julien Candelon's feet put Stephen Parez away.
France continued to press hard and it looked like Julien Candelon had scored from a set piece, but Stephen Parez's final pass to him was forward. However, Parez made up for the mistake shortly after by scoring on the left-hand wing - France leading 12-5 at the break.
The Ioane brothers then took matters into their own hands and turned the game around. Akira Ioane steamed down the left wing to score and then Rieko Ioane did the same down the right. Their tries swung the game in New Zealand's favour.
Regan Ware added his second try to boost their cushion, but France were looking to have the final word. They did, as Sacha Valleau left the Kiwi defence standing. However, New Zealand still progressed into the fifth-place play-off.
Tom Cusack has been one of Australia's stand-out players and he made his mark on this match. Cusack showed all of his power - not one but twice - and Australia opened a big early lead.
A quick skip and a step from Con Foley added Australia's third try. However, Los Pumas weren't giving up. Off a scrum, Gaston Revol dummied right then went left and they had their score back - 21-5 at the break.
Gaston Revol was a man on a mission as he got the ball out wide and pinned his ears back for the first try of the second half. Matias Moroni's try then brought Argentina back to within a two points and after the hooter had gone for full-time, they retained the ball and the match-winning try came from a beautiful Axel Muller offload to Moroni.
Results:
New Zealand 24-19 France
Argentina 26-21 Australia
Ninth-place play-off - United States 24-12 Spain:
Pablo Fontes came into the team as an injury replacement and he started the try-scoring on the left wing. After conceding early Danny Barrett took matters into his own hands and went through the middle of the Spanish defence.
Much was said about the United States's speedster Carlin Isles and he showed why - taking the ball deep inside his own half and set off, taking outside line to beat Marcos Poggi and Angel Lopez.
Spain were patiently working their way back into the game, with a combination of Matias Tudela and Angel Lopez delivering a try for Lopez. The scores were level for a matter of seconds though, as the United States cooly set up an easy game of numbers and scored on the left.
The United States had the final say of the game. Andrew Durutalo made the big fend on the left, to give Carlin Isles the space to show his pace for one last time. The result means the Yanks finished ninth.
Eleventh-place play-off - Brazil 0-24 Kenya:
The final day's action, between hosts Brazil and Kenya, in glorious sunshine - after a spot of rain on Wednesday.
Less than 20 seconds after the opening whistle Billy Odhiambo collected possession and powered into the corner. After conceding so early in this game Brazil attempted to get back in the game, the Kenyan defence proved too difficult to breach and Andrew Amonde popped an inside ball to Billy Odhiambo and he raced over.
The Kenyans then put their foot on the gas - first Willy Ambaka took the outside line and left the Brazilians clutching thin air, before Billy Odhiambo did the same on the other wing. Brazil could not buy a score, even knocking on with an open tryline - meaning Kenya finished 11th and the hosts last.
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