Five days before Australia's first World Cup qualifier in Melbourne last February, Vargas said the A-League-based Roos were unimpressive in a warm up match in a 1-1 draw with Melbourne Victory.

"To be honest, playing a club side and the game is less than a week away, you'd be expecting to win these kinds of games. We struggled to break them down," he said at the time.

"So there are no excuses and I'm sure the coach will have a few words with the boys and I'm sure a few boys will be thoroughly disappointed. I'm sure'll there'll be a few interesting things said by Pim [Verbeek]."

Socceroo coach Pim Verbeek apparently agreed and he subsequently called in the overseas brigade who duly despatched the Qataris with ease 3-0 at Telstra Dome.

Now Vargas says the A-League players have more experience in Asia and domestically and can do the job in front of the expected 90,000 crowd at the Gelora Bung Karno stadium in Jakarta on Wednesday night.

"It's still pretty tough, we've been put together in the space of a couple of days and some boys played last night," he said today after arriving in Indonesia on Sunday.

"But I think the A-League boys will show a lot of spirit and do everything to get a result and do their country proud.

"I'm sure there won't be an excuses for any of the boys."

Despite not knowing much about Indonesia, Vargas says the Socceroos will take them seriously for this important first up clash.

"It's going to be humid and it's been raining a fair bit and I'm sure they'll get a pretty good crowd [at the Geloro Bung Karno stadium]," he said.

"It will be tough no questions about that but I'm sure we can pull together and do a job."

There was a light session today at 3pm for around 10 players already in camp with those from the Sydney, Newcastle, Central Coast and the Reds arriving tonight.

Verbeek also arrives in Jakarta later tonight. There'll be another session at the stadium on Tuesday.

And despite being confirmed as winning the A-League minor premiership following last night's A-League results, Vargas says the Victory boys in camp are keeping a lid on their emotions.

"We were watching the Internet for updates when we were in Singapore but once we touched down in Jakarta, we got a few text messages.

"It would've been nice to celebrate with the boys at home but we're here representing our country."