"I am not worried about Ronaldo at all," Ronaldinho was quoted as saying by Sky Sports Network.

The Real Madrid striker produced lackluster performance in Brazil's 1-0 win over Croatia in the World Cup's Group F clash and was under heavy criticism from media ever since.

"He still has so much quality and all the players are very confident in him," the Barcelona star added

"In this squad, all the players help each other. Once the game starts, mentally we are fine and forget everything else that goes on. I am sure Ronaldo will help us to win the World Cup."

Brazil are placed second in Group F with three points with Australia leading the standings on goal difference.