Caster Semenya to switch to 200m in bid to qualify for Tokyo Olympics

Caster Semenya could go head-to-head with Dina Asher-Smith at the Tokyo Olympics after the South African announced her intention to switch events from the 800m to the 200m.

Under World Athletics rules, the Olympic 800m Champion is prohibited from competing in events between 400m and a mile without taking testosterone-reducing drugs.

However, the rule does not apply over shorter distances and the 29-year-old says she will switch her target to a distance in which British star Asher-Smith was crowned world champion in Doha last year.

In a statement posted on her Instagram page, Semenya wrote: "My dream has always been, and will continue to be, to compete at the highest level of sport and so in order to pursue my goals and dreams I have decided to change events and compete in the 200m.

"This decision has not been an easy one but as always I look forward to the challenge and will work hard, doing all I can to qualify for Tokyo and compete to the best of my ability for South Africa.

"Thank you to my team who have supported me over the past few months and thank you to all South Africans who believe in me and stand behind me."

Semenya has rejected the IAAF's conclusion that without taking the now-required medication, she would have an unfair "competitive advantage" over the longer distance.