Nanjing, March 23 -- Amber Anning announced herself on the global stage by becoming Great Britain's first women's 400m champion at the World Athletics Indoor Championships.

At the beginning of her first season as a professional athlete, the 24-year-old clocked 50.60 seconds to edge a dramatic race to the line against American Alexis Holmes.

It is only two weeks since Anning was left devastated at the European indoors, where her medal bid was ended by a disqualification for a lane infringement.

But she held her nerve following a mid-race shove from Holmes before measuring her final effort to perfection to claim her first international title in Nanjing, China, according to a BBC report.

Anning initially showed little emotion after her har...