
Asafa Powell (L) and Yohan Blake of Jamaica compete during the men's 100m race final at the IAAF World Challenge Meetings in Zagreb, Croatia, on Aug. 29, 2017. (Xinhua/Goran Stanzl)

Asafa Powell (L) and Yohan Blake of Jamaica compete during the men's 100m race final at the IAAF World Challenge Meetings in Zagreb, Croatia, on Aug. 29, 2017. (Xinhua/Goran Stanzl)