France has claimed its first gold medal at its own Olympics — and the first of any kind in men's rugby sevens when — with skipper Antoine Dupont leading Les Bleus to a stunning 28-7 win over double-defending champions Fiji. 

The Fijians had won all 17 of their previous matches in the Olympics and were hot favourites to complete a hat-trick of titles against a team that did not even qualify for Tokyo, but the bookmakers reckoned without the remarkable Dupont.

He might have been on the pitch for only seven minutes but Dupont's impact was immense, tearing open a game level at 7-7 by setting up the try that put France ahead and then scoring two himself.

The night had begun ominously for the hosts, and the desperately expectant 67,000-crowd, as after starting slowly in their previous games, Fiji hit the ground running when Joseva Talacolo finished off a classic move two minutes in.

France kept their composure though and the home fans exploded when Jefferson-Lee Joseph dived between the posts and Rayan Rebbadj converted to level the scores at half-time.

Both countries' prime ministers were in the stadium but there was no question about who was the most popular man in France when Dupont joined the fray for the second half.

The man who missed the Six Nations to throw his weight behind the sevens campaign had an immediate impact as he scampered down the left wing and cleverly fed Aaron Grandidier Nkanang for France's second try, which Paulin Riva converted.

He then barrelled over to break Fiji's resistance and the delirious fans almost took the roof off when Dupont took a tap penalty to crash over again in the final play of the match.

"It's such a great honour to win this title and I have such great emotions," Dupont said after the game. 

Earlier, South Africa beat six-man Australia 26-19 with a last-play try by Shaun Williams to take the bronze medal.

The three-day women's competition gets underway on Sunday.

Reuters