Pedzisa mutsara unotevera:
Mumitambo yeAll-Africa ya2003 kuAbuja, Nigeria, Thirsk akawana menduru nhatu: sirivha mbiri mumakwikwi emamita makumi mashanu kumusana (27.04) uye 100 m kumusana (57.60), uye imwe chete yendarira mumakwikwi emamita mazana maviri kumusana (2:09.79).