Cristiano Ronaldo is "not concerned" by his ongoing struggles for Portugal despite failing to score in a competitive international for two years.

Carlos Queiroz's side take on North Korea in Cape Town on Monday in their second Group G clash desperate to secure victory but Ronaldo - whose last competitive goal was at Euro 2008 - has attempted to play down the pressure he is under.

"I haven't scored in two years for Portugal," he said. "I'm not concerned with that aspect, the goals will come, today, tomorrow or in a few years' time. If I don't score, it's not the end of the world."