Virgil van Dijk has hailed Liverpool forward Roberto Firmino as 'world class'.

The Brazilian scored a hat-trick in Saturday's incredible 9-0 win over Bournemouth.

And van Dijk heaped praise on his teammate after the final whistle.

"We know the quality he has and we never doubt him," Van Dijk told reporters.

"He wants to perform in the best way possible because he has the quality.

"Today he showed again why he is a world-class player."