Pedzisa mutsara unotevera: Mukuoneka kwake bedzi kweOlympic, Diagana akapedza ari pachinzvimbo chechina mumakwikwi okupedzisira emamita 400 ane mhinganidzo emaOlympics a1992 muBarcelona. Mumitambo yeOlympic iyoyo, yake
4 x 400 metres relay team yakabviswa mumakwikwi aya.