World 100m hurdles champion Tobi Amusan is in danger of missing out on the 2023 World Athletics Championships in Budapest next month after being charged by World Athletics’ Athletics Integrity Unit with missing three anti-doping tests within a 12-month period. She has vowed to fight to clear her name in time to try and defend the title she won in Oregon a year ago.

The Nigerian champion, who is coached by Jamaican Olympian Lacena Golding-Clarke, has revealed that the AIU has slapped her with a charge that could see her suspended from the sport for up to two years.

"Today the Athletics Integrity Unit (AIU) has charged me with an alleged rule violation for having 3 missed tests in 12 months,” she said. “I intend to fight this charge and will have my case decided by a tribunal of three arbitrators before the start of next month’s World Championships.”

Amusan holds the world record for the event and has been rounding into form after early season struggles with injury. On Tuesday, she followed her win in 12.34 at Sunday’s Diamond League meeting in Silesia with a 12.35 winning performance in Szekesfehervar, holding off 2019 world champion Nia Ali, who clocked 12.41 and Alaysha Johnson was third in 12.50.

She insists that she is innocent of the charges that the AIU has laid against her and expressed confidence that she will be cleared in short order.

“I am a CLEAN athlete, and I am regularly (maybe more than usual) tested by the AIU,” she wrote on Instagram. “I was tested within days of my third “missed test”. I have faith that this will be resolved in my favour and that I will be competing at the World Championships in August.”