"Everyone knows we don't have the best players in the world," Coumans said.

"Some of the players involved play in the Championship, which is a good league but it's not the top league in England, Robbie Kruse plays in the second division in Germany."

Despite the blunt observation, Coumans was quick to clarify it would not hinder the Socceroos chances of progressing in Russia.

This is a sentiment shared by Socceroos coach Bert Van Marwijk who already addressed the group earlier in the camp.

"Bert mentioned this a few times it's not about the best players, it's about being the best team, and with the mentality and the attitude the players show, I believe we can be the best team," he said.

"That is one big step to the next level."

It's been a whirlwind tour for Coumans who has come full circle with Van Marwijk to land the role of assistant coach of the Socceroos for the World Cup.

"Well I knew Bert already for a long time - 30 years ago I think," he said.

"When we first met he was my Under-16 coach, and then again he was my coach in my senior team in Holland.

"In 2013, I got my pro license and we met each other again, and he invited me for a chat at his house and he told me he wanted to bring me in as an assistant.

"In 2015, we went to Hamburg, to Germany, a big club, a big league. Two years later we went to Saudi and now with the Socceroos which I'm delighted about."

Despite their enthusiasm, it was a baptism of fire for the duo with a 4-1 loss to Norway away, before backing up with a 0-0 draw with Colombia at Craven Cottage.

But the Dutchman can already see the differences between the two camps in the lead-up to their clash with Czech Republic on June 1.

"The first 10 days in Norway and London the boys were very quiet," Coumans said.

"This week they are opening already and understand where we want to go.

"We can't give them what we want to do in one day, so we have to go step by step."

It hasn't been without it's difficulties however, with Coumans admiting that varied off-seasons on multiple continents was playing havoc with their preparations.

"The most difficult thing about this week is that the players come in at different times," he said.

"(With) some players the league has stopped two or three weeks ago, with Josh Risdon, even four weeks ago."

"We've got to get them all on the same (physical) level - thats the most important part of this week."

However, the assistant coach was confident that things were starting to come together in Turkey.

"I think if you see the first few days then today's and yesterday's training sessions you will see they have improved," he said.

"The quality of the training sessions are getting higher and higher.

"That's the only way to develop our style of play, I'm confident the coach will get it (the squad) in the right direction."

With the friendlies against Czech Republic and Hungary fast approaching, Coumans was quick to stress to that preparation was key, and that these matches would play a pivotal part in their preparations for the World Cup.

"When you get a rhythm from training sessions towards a game, then recover, training sessions towards a game, then we go prepare for Russia," he said.

"Then you get a more natural rhythm to the preparation so that's good. You also can see the way we want to play, which players are involved.

"You have to go down a little bit in intensity as well because we think the games are important."