"Since the commencement of his managerial duties in Turkiye, Fenerbahce manager Jose Mourinho has persistently issued derogatory statements directed towards the Turkish people. Today, his discourse has escalated beyond merely immoral comments into unequivocally inhumane rhetoric.
"We hereby formally declare our intention to initiate criminal proceedings concerning the racist statements made by Jose Mourinho, and shall accordingly submit official complaints to UEFA and FIFA.
"Furthermore, we shall diligently observe the stance adopted by Fenerbahce - an institution professing to uphold “exemplary moral values” - in response to the reprehensible conduct exhibited by their manager," the Galatasaray statement read.
At issue are Mourinho's statements after the match. The Istanbul derby was officiated by Slavko Vincic, a foreign referee, and at the end, the Portuguese coach thanked him, which triggered a reaction from his opponents.
"I have to thank the referee. With everyone on the opposing bench jumping like monkeys at every decision, he had great character in what can be considered a jungle environment.
"If he'd been a Turkish referee, he'd have given Yusuf Akcicek a yellow in the first minute and I'd have had to substitute him after five minutes," he said of the young centre-back who played.
Galatasaray lead the Turkish league with 64 points, six more than second-placed Fenerbahce, with 12 games still to play.