Is it permissible for a karate practitioner to engage in a final match to obtain the black belt against an unveiled girl, given his strong desire to obtain the belt?

It is not permissible to practice karate with a woman, especially if she is adorned and displaying her beauty, due to the forbidden mixing and touching involved. Previous fatwas have clarified the regulations for the permissibility of practicing karate, among which is the absence of mixing with women. It has also been reported that whoever gives up something for the sake of Allah, Allah will compensate him with something better.