Real Madrid manager Zinedine Zidane says they “have to believe” Wednesday’s El Clasico against fierce rivals Barcelona will go ahead.
The La Liga match was originally scheduled for 26 October but was postponed because of fears of civil unrest in Catalonia.
Both sides are level on 35 points but Barca top the table on goal difference.
“In games like this you’ve got to produce your best throughout the 90 minutes,” said Zidane.
The game has been delayed by two months after days of protest took place in Barcelona as nine Catalan separatist leaders were convicted of sedition over their role in the referendum and handed jail sentences of between nine and 13 years.
La Liga made the postponement request because of “exceptional circumstances beyond our control” as more protests were expected in Barcelona on the day of the match.
Both clubs disagreed with calls to switch the game to Madrid, but will share the same hotel in the lead-up to Wednesday game and travel at the same time two hours before kick-off amid security concerns.
Zidane said: “That’s something different for us. We’ve been told that we have to leave together and that’s what we’ll do.
“There’s nothing else to explain. The important thing is that the game goes ahead.”
Barcelona head coach Ernesto Valverde added: “I think we could have played the game on the original day and there is no reason why we can’t play the game tomorrow.
“It is unlikely in a situation like this that the players will meet before the game, so I probably won’t see Zidane, but I have a lot of respect for him.”