Hong Kong's men's rugby sevens team have successfully defended their gold medal at the Asian Games, defeating South Korea 14-7 in the final on Tuesday.

A try from Cado Lee just before the end of the first half gave the SAR the lead, with Liam Doherty extending it to 14-0 early in the second.

South Korea's Chang Yongheung got one back during their team's power play, but that was all Hong Kong relinquished.

The SAR's Yiu Kam-shing, who said he's retiring after the games, said he was ecstatic he could go out on a high point.

"I'm still enjoying the moment, I can't describe how I feel. It's so hard to describe," he told HOY TV.

"The Hong Kong rugby team has taken another step. It's so hard to defend the title, and I think we can control the pressure, we have proven that we can."

In the semi-final match earlier, the SAR team came from behind to defeat Japan 12-7.

Hong Kong's men had also managed to make the final in the previous three tournaments, grabbing silver in 2010 and 2014.