Mezue ahịrịokwu na-esonụ: Courtois nwere ọganihu site na usoro ntorobịa nke Genk, ma dị afọ 18, o keere òkè dị mkpa na mmeri ndị otu ahụ na Belgian Pro League. N'ọnwa Julaị afọ 2011, ọ sonyeere Chelsea maka ego ruru nde £ 8, ma nye ya Atlético Madrid ozugbo. N'ime oge atọ ọ nọrọ ebe ahụ, o meriri Europa League n'afọ 2012,
Copa del Rey na 2013 na La Liga aha na 2014. O ritekwara Ricardo Zamora Trophy maka onye na-eche nche kachasị mma na La Liga, maka arụmọrụ ya n'oge abụọ ikpeazụ ya. Courtois laghachiri na Chelsea na July 2014, na n'oge mbụ ya, o nyeere ha aka imeri iko League na Premier League. Afọ abụọ ka e mesịrị, o meriri Premier League Golden Glove dịka Chelsea meriri otu egwuregwu ọzọ. Na 2018, Real Madrid bịanyere aka na Courtois maka £ 35 nde, na-aghọ onye na-eche nche La Liga kachasị ọnụ, na-eme ka ihe ndekọ Jan Oblak. O meriri aha La Liga nke abụọ na iko nke atọ nke Zamora na 2020.