Hes won 34 caps for his country, scoring five goals, including a free-kick on his debut against Guam back in 2012. Despite featuring a handful of times for Australia before the 2015 Asian Cup, he was not selected for the squad which eventually won the tournament on home soil. However, he rose to incredible prominence under Postecoglou towards the end of the year, and has been a key Socceroos performer since then.Mooy has no real weaknesses to his game which makes him a fine player to build a team around, and he should also be on set pieces in Russia, meaning much of Australias attacking play will go through the Huddersfield man.ONE TO WATCHCroatia-born Milos Degenek made his debut for Australia in a friendly against England prior to Euro 2016, having enjoyed a solid season with 1860 Munich in the 2. Bundesliga. A versatile defensive-minded player, Degenek’s strongest positions are defensive midfield – where he played for 1860 – and centre-back – the position he has primarily played for Australia; he is also comfortable on the right side of defence.Under Van Marwijk Degenek has played every minute in central defence, and with the Dutch coach choosing a more defensive set-up than Postecoglou, it could lead to some standout performances by the 24-year-old. Nine of his 17 Australia caps came in qualifying so he is clearly trusted at the highest level, and fine performances from Degenek could earn him a move back to Europe, having left Munich for Yokohama F. Marinos of Japan last January.Degenek joined the club to keep his international status alive as he had fallen out of the first-team picture at 1860, and he enjoyed a fine debut campaign with Yokohama, being named in the J.League Young Players Best XI for the 2017 season.FIXTURESSaturday, June 16: FRANCE v Australia (Kazan Arena, Kazan) – kick-off 11:00Thursday, June 21: DENMARK v Australia (Samara Arena, Samara) – kick-off 13:00Tuesday, June 26: Australia v PERU (Fisht Olympic Stadium, Sochi) – kick-off 15:00KITS 4 RECORD IN QUALIFYINGAustralia had one of the longest qualifying campaigns of any nation at the World Cup, having to progress through three rounds and then an intercontinental play-off just to book their place in Russia.They eased their way out of their group in round two, but found things much tougher in round three; though the Socceroos only lost one game, they finished third and had to play-off against the third placed team from the other group. Syria were their opponents and Australia required extra time to progress through 3-2 on aggregate, before having a more comfortable time of it against Honduras in the inter-continental qualifier.A 0-0 draw in Honduras was followed up by a 3-1 home win to finally confirm Australias place at the finals; captain Jedinak netted a hat-trick in the Sydney showpiece.TOURNAMENT PREPARATIONSTwo matches have been planned by Australia as they prepare for the World Cup, both of which will be played in Europe. The Socceroos visit Austra to face the Czech Republic, before ending their World Cup warm up against Hungary in Budapest.BASE CAMPHC Ak Bars Training Base, KazanPROBABLE LINE-UPtalkSPORT will be with listeners all day and all night at this year’s 2018 FIFA World Cup with over 800 hours of World Cup content and all 64 games live across the talkSPORT network. 4 It’s Australia’s fifth World Cup and talkSPORT.com takes an in-depth look at the Group C nation.MANAGERThe man who guided Australia through their entire qualifying campaign, Ange Postecoglou, left after the Socceroos booked their place in Russia and was replaced by Bert van Marwijk. The Dutchman was available having failed to agree a new contract with Saudi Arabia despite successfully leading them to Russia – finishing above Australia in their group to claim the final automatic promotion spot.The 65-year-old was in charge of the Netherlands when they finished runners-up at the 2010 World Cup, and he has also worked at clubs in Germany and his native Netherlands.He has taken charge of just four matches since being appointed by Australia, a 4-1 defeat at the hands of Norway, a 0-0 draw with Colombia, a resounding 4-0 win over the Czech Republic and, most recently, a 2-1 victory over Hungary. The biggest change Van Marwijk has made since taking up the reins is replacing Postecoglous attacking 3-4-2-1 system with a more traditional 4-2-3-1.CAPTAINAston Villa midfielder Mile Jedinak was named Australia captain in 2014 and he wore the armband at that years World Cup and the 2015 Asian Cup, which the Socceroos won with a defeat of South Korea in the final. The 33-year-old missed the Confederations Cup last summer, but featured in ten of Australias qualifying matches for the World Cup, scoring an impressive return of ten goals.His most important strikes came in the inter-continental play-off against Honduras, with Jedinak netting a hat-trick in the second leg to secure a 3-1 aggregate victory which booked Australias place in Russia.With 75 caps to his name, Jedinak is one of the veterans in Van Marwijks squad, and he is a well-known figure on these shores having played for Crystal Palace between 2011 and 2017, before joining Villa, whom he still currently represents.KEY PLAYERAaron Mooy enters the World Cup on the back of a fine campaign at the heart of Huddersfield Towns midfield. The 27-year-old joined the Terriers on a permanent deal last summer following a season on loan from Manchester City, for whom he never represented at professional level.