South Korea's An Se-young consolidated her status as the top player in women's badminton by winning the Olympic title on Monday, beating China's He Bingjiao in the final in Paris.

Reigning world champion An, who has held the number one ranking for the past year, beat her sixth-seeded opponent 21-13, 21-16 at a lively La Chapelle Arena.

The 22-year-old An is the dominant force in women's badminton and won eight titles on the world tour last year.

She became South Korea's first Olympic women's singles champion since 1996.

He, who lost the bronze medal match at the Tokyo Olympics three years ago, progressed to the final when her opponent Carolina Marin retired from their semi-final after collapsing with a knee injury.

She was looking to win China's third badminton gold of the Paris Games, following successes in mixed and women's doubles.

He made An work for every point in a fast and furious first game, until the South Korean began to ease ahead towards the finish.

She closed the first game out when He smashed a return into the net.

An quickly gained the upper hand in the second game and her march towards the title began to look inevitable.

He slowed her progress with an incredible smash return midway through the game but An would not be stopped and she sealed the win on her third match point.

"My golden age isn't here yet because I'm still young," the South Korean gold medallist said.

"I will still have more experiences and I will be able to play even better."

He said she was happy to take home the silver medal.

"I think from the moment I qualified for the Olympics it’s been a hard journey, since at the time I was only able to come here because I won by a slight margin by the end. So I treasure this opportunity a lot, and I am very happy that I can come all the way from preliminaries to the end."

Indonesia's Gregoria Mariska Tunjung won the bronze by default after Marin's semi-final retirement. (AFP)