Australia’s Michael Hepburn retained his pursuit title at the world track cycling championships with Ireland’s Martyn Irvine claiming silver.

It was 21-year-old Hepburn’s second gold medal of the championships, coming a day after helping Australia win the team pursuit title.

Hepburn won in a time of 4min 16.733sec with 19-year-old Swiss rider Stefan Kueng claiming bronze.

In the bronze-medal clash, Kueng won by close to four seconds over 18-year-old Australian Alexander Morgan.

Hong Kong’s Sarah Lee Wai Sze won the women’s 500m time trial gold.

The Hong Kong star, 25, defeated Germany’s Miriam Welte in the event, which is making its debut at the championships, with Britain’s Rebecca James taking bronze.