Ronaldo reckons Real need support from the stands and has pointed to his time at Manchester United for how supporters can inspire the players.
"In Manchester it was the same from time to time, as the fans were silent for a while before they started to sing and help the players," Ronaldo said.
"You don't always have to play brilliantly to get the fans excited. I know it's not easy but supporters occasionally have to try and enthuse us.
"Everyone in the stands are fans of Real Madrid and want the best for the team. Together we will be better and more formidable at home."