Nigerian 100m hurdles world record holder Tobi Amusan has vowed to "fight" after being charged with missing three doping tests.

The 26-year-old will miss the World Athletics Championships in Budapest next month if the Athletics Integrity Unit (AIU) upholds the charge.

The double Commonwealth Games gold medallist denies taking performance-enhancing substances.

Amusan set a new world record in 100m hurdles at the World Championships in Eugene, Oregon in July 2022, crossing the line in 12.12 seconds.

Athletics works to a 'three strikes' rule and it is alleged Amusan missed that number of doping tests in the space of 12 months.

World Athletics' anti-doping rules state any athlete failing to declare their whereabouts for a doping test on three occasions over a 12-month period is ineligible to compete for two years, subject to a reduction to a minimum of one year depending on the degree of fault.

Amusan won the Diamond League meet in Silesia on Sunday, her second win in the series this season after a victory in Stockholm.

The World Athletics Championships will be held in the Hungarian capital from 19-27 August.