Tunisia up for cup fight with Socceroos

Socceroos coach Graham Arnold wants a footballing fight and Tunisia's coach says he's going to get it in their World Cup encounter.

Arnold has forecast a physical scrap of a clash at Al Janoub Stadium on Saturday (2100 AEDT kick-off) as both nations seek a lifeline in the cup.

And Tunisian coach Jalel Kadri says, from his scouting, that's exactly what he's preparing his players to expect from the Australians.

"These are the specificities of the Australian team, it has a high level of athletic performance," Kadri told reporters.

"Nevertheless we are convinced of our capabilities.

"And we have players who are ready to face this challenge."

After losing 4-1 to France, Australia have identified the Tunisia match as a must-win to have a hope of progressing to the knockout stage for only the second time.

Tunisia, who drew with Denmark first-up, have never advanced from the group in their past five campaigns.

"This is a key match for us and for Australia, you know how important this match is for both national teams," Kadri said.

"We need to know how to negotiate the match to get the best result possibly.

"The Australian team is a very respected team ... I consider that it's capable of playing a high level of matches.

"They have players who are able to run very rapidly, who can ensure a good exploitation of opportunities.

"Nevertheless they have some weaknesses which we will be able to invest in."

The Tunisians will bask in a swell of support in Qatar, with Australia bracing for a hostile reception in the pro-Arab crowd.

"It is a great opportunity for us to participate at a World Cup in an Arab country where the Tunisian community is present strongly," Kadri said.

"We know that this will give us a great push and is something that could be added to the performance."