France’s sports minister has called for soccer club Monaco to be sanctioned after one of its players covered over an anti-homophobia message on the team’s shirt during the team’s final league game on Sunday.

A group fighting homophobia in soccer has called on the French league and Paris Saint-Germain to ask player Idrissa Gueye for an explanation after he missed a game last week amid reports that he refused to play because he did not want to wear a rainbow-colored number on the back of his jersey.