Pedzisa mutsara unotevera: Muna 2009, pamwe chete nokusimudza kwake simba, Duke akatanga kupinda mumitambo yemitambo yepara. Akakwikwidza zvose zviri zviviri F40 kupfura uye pfumo paCP Sport Grand Prix muNottingham neCzech Open. Muna 2010 pamwe neNottingham Grand Prix, Duke akapindawo muBerlin Open. MuBerlin akapedza ari wechina mumakwikwi ekudonha dhisiki uye kupfura, uye wekutanga mumakwikwi ekudonha nedombo, achienzanisa zvaaive akamboita mumakwikwi aya paakamhanyisa 29.53m. Muna 2011 Duke akatora menduru yegoridhe muchiuto paIWAS World Junior Championships yakaitirwa kuDubai, uye akarekodha zvakanakisa zvake muchiuto che33.38m kuCzech Open. 2011 yakaonawo Duke ichikwanisa kupinda mu
IPC Athletics World Championships muvarume F40 <unk> javelin. Kukanda kwake 32.64 kwakamuwanira menduru yendarira.