Croatia coach Zlatko Kranjcar expects Australia's main threat in the Group F crunch clash to come from striker Mark Viduka.

Middlesbrough ace Viduka has an unimpressive record on the international stage, scoring six goals in 35 games for the Socceroos, but Kranjcar is wary of the threat posed by the big target man.

He said: "Their greatest danger is that they play as a team and that they have Mark Viduka.

"We will have a man on him the whole time. Who that is you will know tomorrow.

Defender Josip Simunic added: "Maybe Harry Kewell and Viduka are half of the team. I would prefer not to face them."

Fellow stopper Stjepan Tomas, who will replace the suspended Robert Kovac, concluded: "He is one of the best strikers I have ever had to defend against.

"We are good friends. It's a great opportunity to be playing against him."