The uncertain futures of veterans Tim Cahill, Mile Jedinak and Mark Milligan mean there's likely to be personnel changes.

As well Australia's failure to score in open play in three matches has to lead to changes in attack, which must be a big focus for Arnold immediately.

So we've decided to take a look at seven possible newcomers for the Asian Cup.

Adam Taggart (Brisbane Roar)

The 25-year-old striker has fallen off the international radar since playing at the 2014 World Cup, after an injury-cursed stint in England. He couldn't shake off the injury issues at Perth Glory but still managed 20 goals in 40 appearances which is a decent return. If he can find fitness and regular goals at Brisbane, he's every chance to return to the national set-up given he's still only 25 and there's few Aussie forwards who tick those boxes.

Chris Ikonomidis (Lazio)

Long hailed as the next big thing, Ikonomidis reminded us all of his potential with an impressive loan stint with Wanderers last season, scoring three goals in 10 games and setting up a few others. The 23-year-old winger has opted to return to parent club Lazio, where he's unlikely to see first-team action, but a loan stint elsewhere in Europe could see him catapult back into the national frame, given his attacking quality.

Ben Folami (Ipswich Town)

Little-known Sydney-born teenager who broke into the Ipswich first team late in the Championship last season and has plenty of promise. The 19-year-old is a forward, which is Australia's problem area. He didn't score in his five first-team appearances for the Tractor Boys last term but didn't look out of pace. He has pace and plays direct, can play wide or up front. Remember this name.

Brandon Borrello (Kaiserslautern)

The ex-Brisbane Roar winger is currently sidelined after suffering an anterior cruciate ligament injury in April. That injury will affect his Asian Cup aspirations but he has made good early progress and if he can get back in October or November, he's a chance for selection having displayed excellent form for Kaiserslautern in Germany's 2.Bundesliga earlier this year. Kaiserslautern's relegation to the third tier means his future is up in the air with links to SC Freiburg and Hamburg SV.

Ajdin Hrustic (FC Groningen)

He's a youngster playing regularly in the Dutch top flight but his name seldom gets mentioned. Hrustic, who turned 22 on Thursday, can play on the wing but settled into the number eight with Groningen in the second half of last season, when he was a regular starter. That's a position full of competition in the Socceroos squad, including Tom Rogic, Jackson Irvine and Massimo Luongo, but the youngster has versatility which could be handy.

Riley McGree (Melbourne City)

Still only a teenager, the midfielder shot to global fame with his remarkable scorpion goal in the A-League finals for Newcastle last term. However, he'd already previously received a Socceroos call-up as a 18-year-old, before landing a move to Belgian powerhouse Club Brugge. His loan spell at the Jets was impressive offering an attacking threat, midfield composure and something different, being left sided. He's joined City on loan this season where he could shine.

Brandon O'Neill (Sydney FC)

A left-field choice, but the central midfielder is a chance given the futures of Milligan and Jedinak, who play similar roles, are uncertain. Working also in his favour is his relationship with Arnold from their time together at Sydney FC where O'Neill developed into a first choice midfielder in a title-winning side. Still only 24, but has reportedly attracted interest also from Republic of Ireland.