Arsenal midfielder Tomas Rosicky has taken a swipe at Real Madrid star Cristiano Ronaldo. The quarter-finals get under way tonight with Portugal facing the Czech Republic in a clash of styles.

Rosicky faced Ronaldo in many Premier League games before the Portugal skipper quit Manchester United for Real Madrid.

Rosicky, 31, said: "He's a good attacker, but he doesn't want to defend.

"Sometimes you can be so good you can afford not to help the defence and just score goals. But is he the best player in the world? I don't know if he is worthy."