Mezue ahịrịokwu na-esonụ: Courtney mere nnukwu ndozi na 800 m na 1500 m kachasị mma na 2013 wee merie ihe omume ikpeazụ na BUCS Championships n'ime ụlọ na n'èzí n'afọ ahụ. N'oge 2014 n'ime ụlọ, ọ meriri aha Welsh n'ime ụlọ wee nọrọ nke atọ na 2014 British Indoor Athletics Championship. N'afọ 2015, ọ hapụrụ oge kachasị mma ya na 800 m na 1500 m ruo 2:05.48 na 4:09.74 nkeji ma ọ mere mba ụwa mbụ ya na 2015 European Athletics U23 Championships, na-etinye nke iri na 1500 m. Ọ bụ ezie na ọ nọrọ na nke asaa na mba na 2016 British Athletics Championship, ọ gbara ọsọ kachasị mma nke 4:07.55 nkeji wee nweta nhọrọ maka 2016 European Athletics Championship, na-asọ mpi na agba nke mbụ naanị. Ya na Cameron Boyek, Sarah McDonald, na Tom Marshall jikọrọ aka were ọlaedo n'asọmpi e ji agba agba agwakọta agba nke mbụ n'asọmpi
2017 European Cross Country Championships.