Brazil coach Luiz Felipe Scolari is under a criminal investigation from Portuguese officials.

They have not confirmed exactly what they are looking into, but the former Chelsea and Portugal boss has denied reports in Brazil and the Netherlands of tax evasion.

Scolari says he has always filed his tax returns correctly wherever he has worked.

"I have correctly filed all my tax returns. In all the countries where I've worked, I've always declared my income," he said in a statement.

He is aiming to win the World Cup with Brazil for the second time, having led them to success in 2002.