Mezue ahịrịokwu na-esonụ: Derwall lara ezumike nká site n'ịchị Galatasaray na 1987 mgbe o nyechara klọb ya aka ịghọ onye mmeri egwuregwu (na nke mbụ ya kemgbe 1973); n'agbanyeghị ịkọ nkọ na ọ nwere ike weghara dịka onye isi nchịkwa nke ndị otu mba Turkey, ọ họọrọ kama ịlaghachi Germany ma nwee obi ụtọ na ezumike nká ya. O nwere obi ụtọ ịhụ na ọkụ ọ na-enwu na-eto nke ukwuu, na Galatasaray na-eru ọkara-ikpeazụ nke 1988-89 European Cup (onye bu ụzọ nke UEFA Champions League) ma merie ma UEFA Cup na
UEFA Super Cup n'afọ 2000.