The Herald Sun reported on Wednesday that Postecoglou would quit the Socceroos even if Australia secured a place at the 2018 World Cup in Russia.

FFA released a statement on Wednesday which did not deny Postecoglou’s potential departure, but said the main focus was the final games against Honduras.

The Socceroos scraped through 2-1 against Syria in extra-time in Sydney on Tuesday and Cahill said the nation should be celebrating the win.

“It’s just speculation, I feel that this angle, the day after the biggest game to qualify for a fourth consecutive World Cup is not needed, especially now,” Cahill said at the FoxSports Melbourne Derby launch today.

“I feel the angles now are before we play the biggest game and there’s an angle to try and derail us. And then Coming out of the game, there’s another angle to not celebrate a 2-1 victory. I just want us to focus on the positives.

“I think we concentrate on celebrating a victory firstly and looking forward to a full house at home in Sydney in front of 80,000.

“Regardless of whether people like or not, everybody is going to be watching. Speculation is always going to come with our game and it’s just disappointing it’s come out the day after.

“(But) it’s not affecting any players… It’s called professionalism.”

Cahill also defended Postecoglou’s decision to start star Aaron Mooy on the bench against Syria.

“I feel for Aaron because he’s played so many games in the Premier League,” he said.

“Whether he starts or not I think you need to look a bit deeper into the amount games he’s played. I also feel we miss the fact we’re also trying to protect him, he’s a professional and every single player has to sit on the bench.

“Every single player has to be part of the bigger picture to see the end result. You can say thing about many players.”

And for now Cahill will turn his attention to this weekend’s Melbourne Derby where he looks to pull on the City blue for the first time this A-League season.

Victory lost their first game 1-0 to Sydney FC while City are coming off a 2-0 win over Brisbane Roar.

The Big V are also welcoming back Socceroos Mark Milligan and James Troisi and All White Kosta Barbarouses.

The 37-year-old said he would be ready to be a part of the starting XI or to come off the bench and is feeling great.

“I feel it’s important we can put on a good performance this week and we can have that derby atmosphere,” he said.

“One week we’re celebrating playing for Australia and next week we’ll be jeering each other in a massive game.”

The game will be broadcasted live on FoxSports and on Network Ten’s free-to-air channel – ONE.