Analysis: Caltex Socceroos v Greece in Sydney

The past week has proven that the Socceroos shouldn't fear anyone in world football.

While Ange Postecoglou's project to turn Australia into genuine contenders on the world stage remains unfinished, the Socceroos' progress under his tutelage can't be underestimated.

Saturday night's 1-0 win over Greece was another reminder - similar to last week's 2-1 loss away to England - that Postecoglou's Australia play the type of modern football that can see them shine at World Cups.

There is no doubt the Socceroos must improve in some areas - the home side again failed to make the most of their possession at ANZ Stadium against Greece - but the days of Australia simply battling at international level are over.

There is immense upside for Postecoglou's team, with Australia finishing the match in Sydney with 11 players on the pitch with an average age of 24.64.

Compare that to the final XI of Postecoglou's predecessor - Holger Osieck - that had an average age of 27.46 and it's clear the Socceroos are in an exciting position.

Postecoglou has overhauled the national team squad, with Jason Geria and Alex Gersbach on Saturday taking his tally to 19 debutants since he took over the Socceroos.

Defender Jason Geria make a challenge on Greek midfielder Lazaros Christodoulopoulos in his Caltex Socceroos debut.

The 50-year-old coach also has Australia playing on the front foot regardless of the opposition - something Socceroos fans could only dream of when Osieck and Pim Verbeek were in charge.

To take the next step, Australia's best players need to find another layer of polish that will make the difference against the best opposition.

That layer of polish will come from playing at higher and higher levels.

The Socceroos will only benefit if the likes of Aaron Mooy, Tom Rogic and Mark Milligan earn contracts at better clubs in bigger leagues.

Rogic has been linked with Arsenal, Fiorentina and Valencia over the past month, while there has been speculation both Mooy and Milligan might be heading to Europe.

While Postecoglou has built an impressive team with very few players in Europe's best leagues, the Socceroos boss will certainly take his side to another level if his squad is tested more often.

It's time for each individual Australia international to truly challenge themselves and target the highest levels of club football.

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