ett ▁and ▁Nor j ann ah ▁H af isz ah ▁Jam al ud in ▁being ▁dis qual ified ▁in ▁ 2 0 1 1 . ▁The ▁ 2 0 1 3 ▁World ▁Championships ▁saw ▁one ▁elim ination ▁in ▁Mas oud ▁Az izi . ▁ ▁Among ▁the ▁men ' s ▁world ▁champions , ▁only ▁Don ovan ▁Ba iley ▁and ▁Us ain ▁Bol t ▁have ▁not ▁been ▁imp licated ▁in ▁do ping ▁during ▁their ▁care ers ; ▁three - time ▁champion ▁Maurice ▁Gre ene ▁never ▁failed ▁a ▁drug ▁test , ▁but ▁adm itting ▁purch asing ▁dru gs ▁on ▁other ▁athlet es ▁beh alf . ▁ ▁Medal ists ▁ ▁Men ▁ ▁Multiple ▁medal ists ▁ ▁Medal ists ▁by ▁country ▁ ▁Women ▁ ▁Multiple ▁medal ists ▁ ▁Medal ists ▁by ▁country ▁ ▁Championship ▁record ▁pro gression ▁ ▁Men ▁▁▁ ▁Ben ▁Johnson ' s ▁winning ▁time ▁of ▁ 9 . 8 3 ▁broke ▁the ▁championship ▁record ▁and ▁was ▁a ▁new ▁world ▁record , ▁but ▁it ▁was ▁ret ros pect ively ▁ann ul led ▁due ▁to ▁do ping . ▁ ▁Women ▁ ▁Fin ishing ▁times ▁ ▁Top ▁ten ▁fast est ▁World ▁Championship ▁times ▁ ▁H ▁– ▁time ▁recorded ▁in ▁the ▁he ats ▁Q F ▁– ▁time ▁recorded ▁in ▁the ▁quarter - final s ▁SF ▁– ▁time ▁recorded ▁in ▁the ▁semi - final s ▁ ▁Best ▁time ▁for ▁place ▁ ▁References ▁ ▁Bibli ography ▁ ▁External ▁links ▁Official ▁I A AF ▁website ▁▁▁ ▁World ▁Championships ▁in ▁Athletics ▁Category : Events ▁at ▁the ▁World ▁Athletics ▁Championships <0x0A> </s> ▁Las uri ▁is