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. Oge 2015 hụrụ ka ọ na-agbada 800 m na 1500 m kachasị mma na 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 wee nweta ihe nrite ọla edo na mmemme mmeghe agwakọtara agwakọta na 2017 European Cross Country Championship.