Atletico Madrid captain Koke has said Real Madrid forward Vinicius Junior can expect "trouble" in Sunday's derby if he performs his trademark dancing celebration after scoring.
The Brazil international has attracted criticism from rival fans and players for instances of showboating and his dance moves when celebrating, which some consider to be a provocation.
Asked if he would understand the reaction of Atletico fans at the Wanda Metropolitano if Vinicius celebrated in his usual way, Koke said: "There would be trouble, for sure, [that is] to be expected."
But Koke said Vinicius, like any other player, was free to celebrate goals how he wanted to.
"If in the end he scores and decides to dance, well, it's what he wants to do," Koke said.
"Would I understand it or not? Everyone has their own way of being and of celebrating goals as they please."
Both Pele and the Brazil Football Federation came out in defense of Vinicius, and were critical of commentary made by a player agent on a popular Spanish football show.
The agent later apologized for his comments, which both Pele and the federation said they considered racist.
"Football is joy. It is dancing. It is truly a party. Despite the fact that racism still exists, we will not allow it to stop us from continuing to smile," Pele wrote. "And we will continue to fight racism in this way, fighting for the right to be happy."