Cahill, 38, has been our main source of goals for the last 12 years, netting 50 from 107 appearances, including scoring at three of his four World Cups.

But the starting front four of the Socceroos at Russia 2018 had a very different set of stats, scoring only 28 goals in total between them from a combined 201 matches.

It's sparked alarm bells among experts and fans with Mile Jedinak now our likely top scorer from the penalty spot in future.

But Cahill insisted the future was bright and had been pounding the basics into the Socceroos attackers on how to find the net in the future.

"I have basically been grooming the next players for the last four years, especially about consistency and playing for their club," said Cahill today as his final Socceroos farewell against Lebanon was confirmed for November 20 at ANZ Stadium in Sydney.

"So if I talk about Tomi Juric, or (Jamie) Maclaren, or Dimi (Petratos) all these sorts of players or even Lecks (Mathew Leckie) as a possible number nine, Tommy (Rogic) is a 10...

"I have been grooming them for goals with their clubs and what happens then, repetition, repetition, repetition. When you do it for your club, you do it for your country.

"Now it's about doing it on the international stage when it counts. It doesn't matter if it's against a team from the Middle East or Asia or internationally or the Asian Cup.

"They all count the same and the effort that you put in for your club has to be the same as you put in for your country.

"And then it's tough, because I've done it my whole career, and it takes a massive toll on your body."

Despite concerns about our barren run up front and the lack of options for new coach Graham Arnold, Cahill remained confident.

"We'll be okay, We'll be fine.," he said. "The same system hasn't changed in four years – the stye, the way we fight to keep the ball, high possession.

"We're programmed in a way that even when Bert (van Marwijk) took us over he was so surprised  with our attitude and our professionalism, the way we carried ourselves and how much we put into preparation.

"So it's the same for Arnie. Arnie's just going to bring in a style that's going to be added to what's been implemented.

"We're gonna defend an Asian Cup and we've got to close the door and I'm excited by a big opportunity for us to do well internationally, again."