Flick's tactical approach, featuring an extremely high defensive line, also seemed ripe for Mbappe and Vinicius to pillage with their pace.
"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.
"We are hurt, it's a tough moment, but I want to thank the fans for their support. We don't have to throw everything away, because there is nothing to throw away," added a downhearted Ancelotti.
The Catalan giants triumphed at the Santiago Bernabeu to snap Madrid's run of 42 matches unbeaten and continue their own revival under the German coach who arrived this summer.
Robert Lewandowski struck twice in two minutes as Barcelona crushed rivals Real Madrid 4-0 on Saturday, inflicting the Spanish champions' first La Liga defeat in over a year.
Defending champions Real Madrid are set to host archrivals Barcelona in a LaLiga game at the Santiago Bernabeu tonight.
Kylian Mbappe's start at Real Madrid has been satisfactory, his performances neither spectacular nor underwhelming, but Saturday's La Liga Clasico offers the French superstar a springboard to kick on from.
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.
Real Madrid duo Thibaut Courtois and Rodrygo are likely to miss the Clasico clash with La Liga leaders Barcelona on Saturday with injury problems.
Real Madrid can open a nine-point lead over bitter rivals Barcelona at the top of La Liga by winning Saturday's 'Clasico' at the Nou Camp.
Despite being former midfield heroes for the clubs they now manage, Barcelona coach Luis Enrique and his Real Madrid counterpart Zinedine Zidane are afforded little credit for their achievements in management.
Saturday's blockbuster La Liga clash between Barcelona and Real Madrid will be preceded by a minute's silence for the 71 people killed in a plane crash that decimated the Brazilian football team Chapecoense.
Barcelona star Neymar said he doesn't fear passionate Real Madrid fans at the Estadio Santiago Bernabeu for the Saturday's El Clasico.
For this weekend, Neymar and Suarez must prove Barcelona can win El Clasico without the rivalry's all-time top scorer Lionel Messi.
Barcelona star Lionel Messi takes part in the first training session of Clasico week, raising hopes he could be set for a timely return at the Santiago Bernabeu on Saturday.
Luis Enrique says Lionel Messi's recovery is proceeding as expected but offered no update on when the Barcelona forward is expected to return to action.
Maradona was chosen number 1 in The Greatest 10 World Cup players of all time by the London-based newspaper The Times. On his 55th birthday, discover the life of Diego Maradona, the footballer as he carved out a special place for himself with his unique talent and skills.
Barcelona were held to a scoreless draw by third-tier Villanovense on Wednesday in a disappointing start to the Copa del Rey for the defending champion.
Barcelona president Josep Maria Bartomeu has responded angrily to reports suggesting Lionel Messi will leave the club, insisting that the reports are "embarrassing".