The 2019 Women 400m World Champion Salwa Eid Naser has been provisionally suspended for not making herself available for doping tests.

Naser was charged under Article 2.4 of the WADA Code that relates to whereabouts violations, according to the Athletics Integrity Unit of World Athletics.

Athletes are required to provide regular updates on their whereabouts to make it possible for anti-doping authorities to carry out surprise testing outside of competition.

A violation means an athlete either did not fill out forms telling authorities where they could be found or were not where they said they would be when testers arrived.

Three missed tests over a period of 12 months are the equivalent of a doping violation.

At the World Championships in Doha, Qatar, the Nigerian born runner stormed to victory in a world-leading 48.14s, the third-fastest time in history upsetting gold the medal favourite Shaunae Miller-Uibo of the Bahamas.

 If a case is proven against her she could miss next year's Olympics set for Tokyo, Japan.