During a Champions League qualifier in August, Sparta fans aimed monkey chants at Monaco midfielder Aurelien Tchouameni when he scored.
UEFA then banned supporters for Sparta's stadium for a Europa League game against Rangers, although it allowed some 10,000 children to attend.
However, the schoolchildren booed Rangers midfielder Glen Kamara, who was allegedly the victim of racist abuse from Slavia Prague defender Ondrej Kudela a few months earlier.
Rangers asked UEFA to act, claiming the booing was racially motivated, but UEFA dropped the investigation over "insufficient evidence" last week.
However, questions about the Czech approach to racism from football supporters persist.
