While it was not clear which statements Galatasaray were referring to, Mourinho said the home side's bench had been "jumping like monkeys" and that the match would have been a disaster if a Turkish referee had been in charge.
After Hansi Flick's side were dealt another set-back in the title race at Getafe's Coliseum stadium Balde reported the abuse in a post-match interview.
"Real Madrid strongly condemns any kind of behaviour involving racism, xenophobia or violence in football and sport, and deeply regrets the insults that a few fans uttered last night in one of the corners of the stadium," said Los Blancos in a statement Sunday.
The viral social media campaign before the September 29 clash encouraged Atletico fans to arrive at the club's Metropolitano stadium and utter "degrading and discriminatory insults with racist connotations" against a Real player, police said.
Williams spoke with the referee after hearing the alleged abuse when he was preparing to take a corner in the first half, and play was held momentarily as supporters were warned.
After numerous instances of abuse hurled at Real Madrid and Brazil forward Vinicius Junior, among others, Infantino told a meeting of South American Football Confederation (CONMEBOL) there were "problems" in the sport.
Real Madrid and Brazil forward Vinicius Junior has suffered racial abuse on many occasions in recent years, with one incident in Valencia in May provoking worldwide outrage.
Francesco Acerbi on Monday left Italy's training camp ahead of two friendlies in the United States after reports he will be investigated for alleged racial abuse of Napoli defender Juan Jesus.
On Thursday, Vinicius urged the European governing body UEFA to take action against alleged racist chants directed at him by Atletico Madrid and Barcelona fans.
The 30-year-old striker, one of the highest profile and best-paid players in the women's game, was charged following the incident in January 2023, police said in a statement.
Udinese will ban for life a man found to have racially abused France goalkeeper Mike Maignan, the Serie A club announced on Monday.
The head of the world governing body said there was no place for discrimination of any kind in football or broader society.
The CBF "will take legal action against those involved in these crimes," it said in a statement.
The Brazilian forward was racially abused during his team's 1-1 draw on Saturday at Sevilla, with the Andalusian club ejecting a fan from the stadium.
Sevilla expelled a supporter for "racist and xenophobic behaviour", the club said in a statement, with Vinicius thanking them for their quick action, as well as highlighting another incident
Valencia-based newspaper Super Deporte ran a front page on Friday labelling Vinicius "Pinochius" with an image of a long nose over the player's face -- a reference to fictional character Pinocchio, whose nose grows every time he tells a lie.
Belgian star Lukaku received the ban after picking up two yellow cards, the second for his goal celebration in front of Juventus fans after a stoppage-time penalty which secured Inter a 1-1 Italian Cup draw in Turin two weeks ago
Lukaku, who was sent off in the first leg of the semi-final, will remain suspended for the return against Juventus on Wednesday after the club's appeal was rejected by Italy's Sports Court Of Appeal
Real Madrid's Brazil forward Vinicius Jr expects punishment to be handed out by Spanish authorities against hate crimes after a mannequin wearing his No. 20 shirt was hung from a bridge in front of the club's training centre ahead of the Madrid derby.
