South Africa's Akani Simbine clocked his second-quickest time in Pretoria ©Getty Images

South Africa's Akani Simbine set a new world lead of 9.91 seconds early in the season in the men's 100 metres in the heats of the Athletics Gauteng North Championships at Tuks Stadium in Pretoria.

The nation's 100m record holder was just 0.02sec short of his own best in his first race of the Championships, which he would go on to win in the final in a time of 10.01, despite slowing down before the line to celebrate.

Simbine ran his fastest race since posting his personal best four years ago in Hungary, where he ran 9.89, and the 2018 Commonwealth Games champion will look to medal on the world stage in Tokyo this summer.

Caster Semenya posted a new personal over 200m ©Getty Images
Caster Semenya posted a new personal over 200m ©Getty Images

He has finished fifth and fourth in the 100m in consecutive World Championships in London and Doha, as well as finishing fifth over the distance at Rio 2016.

Caster Semenya was also present at the meet and raced in the women's 200m, posting a personal best of 23.49 to take the title, but still requires 22.80 to qualify for Tokyo 2020.

Semenya changed her distance after the 400m, 800m, 1500m and mile disciplines required her to take testosterone-reducing medication after a World Athletics ruling was upheld by the Court of Arbitration for Sport last year.

The 200m distance is not covered by those controversial regulations.