The second-up clash for Australia in Russia could make or break the Socceroos' tournament.

Win, and their fate is in their hands heading into the last match with Peru.

Draw, and a narrow pathway should remain open to get out of the group.

Lose, and it's curtains.

Until now, Arzani has been widely regarded as an impact player best suited coming off the bench.

On the eve of Australia's opening loss to France, Socceroos coach Bert van Marwijk said the 19-year-old was "not capable at this level to play a whole game".

But the confident Melbourne City winger believes differently, and that he's proved as much in the hot-weather preparation the team undertook in Turkey over the last month.

"I feel like I'm ready," he said.

"Especially given the intensive training camp in Antalya where we were training two times a day on most days.

"I've given myself the best opportunity.

"I've tried my hardest and that's all you can do. It's just up to the boss now."

Arzani came on in the 84th minute against France, replacing Robbie Kruse, and taking it up to the tired French legs with his pace and trickery.

And he thinks a more attacking approach will be needed against the Danes, given Australia's inability to create chances from open play.

"Definitely if you're going into a game and it's a must-win the only logical solution is to make sure you're attacking more and creating more chances," Arzani said.

Australia's goal came from Mile Jedinak's penalty following Samuel Umtiti's handball.

Arzani said he was filled with pride in his World Cup debut, becoming the youngest Australian to play in a World Cup.

"The biggest moment for me was at the beginning of the game," he said.

"Looking around, seeing Aussie fans in yellow shirts everywhere. Singing the national anthem.

"Your heart is absolutely pumping through your chest and you realise the gravity of the situation, you're representing a whole nation on the biggest stage.

"It is emotional."

With the goosebumps out of the way, Arzani said he didn't feel overawed when he took the field against the highly-rated French.

"It wasn't anything crazy or something I couldn't handle," he said.

"This is what I've wanted to do for so long.

"I just want to be me, I just want to do the best that I can.

"Some people think that's me being cocky but I'm just happy being me."

Australian Associated Press