"It's completely different to start the game and to come on for the last 20 minutes," said Parreira.

"When Robinho came on, Australia were playing with three strikers and there were lots of spaces. We need to know how to use Robinho."

He added that it was not easy to take Ronaldo off the field.

"It's never easy to substitute any player," he said. "But he will improve. Today, he felt much more at home than he did against Croatia."