Sergey Bubka, the former Olympic pole vault champion from Ukraine, has confirmed he will stand against Sebastian Coe for the presidency of the IAAF.
Bubka is, like Coe, currently a vice-president of athletics' international governing body and has long coveted the chance to succeed long-standing president Lamine Diack, who steps down in August.
The 51-year-old, who made an unsuccessful bid for the presidency of the International Olympic Committee in 2013, said: "I am seeking the IAAF presidency to give something back to the world of athletics which has given so many opportunities to me throughout my life."
