 Diallo akahwina menduru yake yekutanga huru pa2014 World Junior Championships muAthletics muEugene, Oregon. Akaputsa rekodhi yake yenyika yejunior kaviri panguva yechiitiko ichi, achimhanyisa 14.24 m pakusvetuka kwake kwekutanga aine 3.2 m s mhepo. Mushure mekukanganisa mumutambo wechipiri, akasvetuka 14.44 m achibatsirwa nemhepo yemamita 3.3 s, kuyedza kwakanga kwakakwana kuti awane menduru yegoridhe. Zvisinei, izvi zviviri zvakaedza hazvina kugamuchirwa sezvinyorwa zvepasi rose zvechidiki sezvo paive nemhepo yakawanda kwazvo pavakagadzirwa. Kuedza kwake kwechina kwe14.20 kwakagamuchirwa sechinyorwa chechidiki chenyika, uye zvakare kwakava kuedza kwechi15 kwakarebesa nguva dzese mukusvetuka katatu kwevakadzi vadiki. Akava wechitatu French katatu jumping kuhwina nyika mudiki zita nokuda France pashure Benjamin Compaoré muna 2006uye Teddy Tamgho muna 2008. 