World record hurdler Amusan charged with missing three drug tests, vows to fight violation

Amusan was charged by the Athletics Integrity Unit for missing three drug tests in 12 months.
The Nigerian hurdler denies taking banned substances and plans to contest the charges.
Missing three tests can lead to a two-year ban, but Amusan hopes to resolve the case before the world championships.
Amusan broke the 100m hurdles world record at last year's world championships but it didn't count due to wind.
She has won two Diamond League events this season and is aiming to compete at upcoming world championships.