Rangers midfielder Glen Kamara and other Black players on the team were booed each time they were on the ball by a number of Sparta Prague's youth supporters during the Europa League match between the clubs on Thursday.
Rangers manager Steven Gerrard told reporters after the game that UEFA needs to address instances of racism more comprehensively and seriously:
"During the game I haven't been aware, I've just been focused on the game and the tactical changes I was trying to think about to try and get us back into the game as we were trailing.