Amusan in a post on her Instagram account stated that she was charged Wednesday with three missed drug tests in a 12-month span.
Nigeria's Tobi Amusan, the world champion and world record holder in the 100m hurdles, has been charged by the World Athletics Integrity Unity (AIU) of rule violation.
The AIU is the Athletics Integrity Unit, which handles doping cases in track and field.
She was charged for allegedly missing three tests in 12 months.
Twenty-six-year-old Amusan has however vowed to challenge the charge which could result in a suspension.
Amusan in a post on her Instagram account stated that she was charged Wednesday with three missed drug tests in a 12-month span.
It could lead to a two-year suspension for her.
“I intend to fight this charge and will have my case decided by a tribunal of 3 arbitrators before the start of next month’s World Championships,” the post read.
“I am a CLEAN ATHLETE, and I am regularly; (maybe more than usual) tested by the AIU - I was tested within days of my third ‘missed test.’ I have FAITH that this will be resolved in my favor and that I will be competing at the World Championships in August.
"In the meantime, I ask that the media respect my privacy while I address these distractions in my upcoming arbitration.”
Her Tuesday’s victory came just days after finished first at the Diamond League meeting in Silesia on Sunday."
26-year-old Amusan broke the world record in the semifinals in July worlds in Oregon, United States last year with 12.12 seconds from 12.20 seconds.