The Socceroos play Iraq in Tehran and then UAE in Sydney at the end of March and the all-time leading goal scorer for the green and gold had a message for City's aspirants.

“I throw my support definitely behind players in my team because I know the work ethic,” Cahill said.

“My biggest message to the Luke Brattans and Neil Kilkennys is week in and week out that they’re doing it. The consistency is always the key the manager looks for, for any player in the A-League which is important."

Midfielder Brattan still remains uncapped at Socceroos level despite receiving some call-ups from Postecoglou in the past two years. At the end of January he believed he needed to rectify his faults in club colours before being in contention once again.

And Neil Kilkenny has featured heavily for City this season as a senior player, but has not featured in the Socceroos since 2012.

Kilkenny and Brattan have been key in City's season

Cahill added: “The opportunities are there through your own minutes and also your game style, so overall there’s definitely a few players that would have a chance.

“But at the same time, Ange doesn’t hand out too many golden tickets too easily. There’ll be elements of available players and who’s played in their teams domestically throughout the world now.”

Cahill has started in 12 out of the 16 game he has played this season and has received some rest over the past fortnight. He served a suspension in the 2-2 draw to Brisbane Roar and played just four minutes in last week’s 5-1 away smashing over Wellington Phoenix.

The Socceroo said staying in top condition was all about management, after feeling flat travelling to Coffs Harbour at the end of January in a 2-1 loss to Newcastle Jets.

Cahill was "humbled" as he stood next to his Madame Tussauds Sydney wax figure in front of AAMI Park on Wednesday in its first trip out of Sydney. And he said he was ready for Roo duty if needed by Postecoglou.

The wax figure will be available for fans to meet before Friday night's game at Gosches Paddock

“For me the consistency of having a good season with Melbourne City has been great," he said.

'I think when I look to the games that I’ve played - the ratio of goals, minutes and management has been really good.

“Hopefully I can take that into the Socceroos if selected. I feel as a group of 30 players, we have to assess how many players are actually playing, what leagues they’re playing in.

"And then the element comes in - how well the A-League players are playing so we can contribute to a big campaign in qualifying for another World Cup and a lot coming ahead.

“You hear a lot of players names thrown in from the A-League, but I suppose my mindset comes around to consistency.

“If I’m playing here and if the body is right, either way if I feel good and if selected then I’ll always play my part. But it’s going to be a big squad and also come down to the wire for who’s fit and who’s not fit from what I’m reading at the moment.”

City play Sydney FC on Friday night and Cahill was ready for the Sky Blues.

Cahill says Friday's challenge will be like another FFA Cup Final

“Since the transition of getting (Michael) Valkanis as manager, it's been great because the discipline side really shows in the activity we’re doing as a group,” Cahill said.

“I think we’re really starting to implement a strong team bond. We can only show that by playing games, but slowly people are starting to see we’re really trying to be positive as a group and really trying to be accountable with our football whether we win or lose.

“It’s nice that there’s a fresh buzz about the team and we’re starting to click well coming towards the end of the season when everyone is playing to finish in the top six and get a finals place. The more games you play and the more you’re involved it can really help you in that running.”