Tim Cahill insisted he is putting Everton first as he returned Down Under for a tour with the Premier League side.
The 30-year-old Australian, who endured a mixed World Cup campaign with a controversial red card in the opening loss to Germany before scoring in the defeat of Serbia, returns to action on Saturday when Everton take on A-League champions Sydney FC.
Cahill will be 34 when the World Cup next takes place and asked about his aspirations to take part in the tournament in Brazil, he said: "My main focus now is Everton.
"I think as long as I stay fit and keep playing consistently then I'll be happy - we'll see what happens in four years."
However, Moyes believes the player will play a key role in Australia's next World Cup campaign.
The Everton manager - speaking at a press conference to promote Everton's tour, which also includes matches against Melbourne Heart and Brisbane Roar - said: "I think he is fit enough to see another World Cup.
"I think he'll be strong enough and able to go for another one - so hopefully it's not his last one."
Cahill has refused to confirm his participation in the AFC Asian Cup, which takes place in Qatar in January.
The 30-year-old declared himself ready to return to club duties despite having barely had a rest this year.
However, when attention turned to the Socceroos' Asian Cup campaign, he would not commit to the three-week tournament, which begins on January 7.
Cahill said: "I'm lucky I've got a great relationship with the (Everton) manager (David Moyes) and the players and the whole staff. It's all about being sensible.
"I'm lucky I've got the right people to talk to and assess that situation when it comes to it."
Moyes insisted he would not stand in Cahill's way should he choose to play for his country, saying: "If it comes in under the FIFA regulations we always abide by them.
"We admire Tim because we've all travelled out here from England and our players are all still in their beds with jetlag."
"For Tim to travel out here and play (for the Socceroos) and then return to play in the Premier League is an incredibly hard thing to do. It should never be underestimated how difficult that is."
On Cahill's dismissal against Germany, Moyes added: "When I saw the sending off I thought it was a terrible decision.
"Tim prepared all through the year. To get sent off for that could have ruled him out of the whole World Cup."
Cahill himself is looking forward to the forthcoming season.
He continued: "I think the best thing for me is focusing on this pre-season and a big season because we put so much time and effort in every year to be as good as we can be and set some targets that we like to live up to."
The Socceroos star was quick to allay fears he has not had a long enough break following the World Cup.
He said: "I think I'm lucky, the gaffer (Moyes) is not putting me through my paces too much.
"This is my country and I want to represent my country and my club as best as I possibly can but there's a programme in place for me where I'm not getting flogged and they're very sensitive to me.
"So I am getting my break and getting my right time (to recover) and obviously looking forward to being a part of this tour."
Moyes hopes the change of scenery will translate into early season success when the Premier League campaign starts on August 14.
The Scot added: "We've tended to choose America in recent years but we've not started the season too well in the last couple of years, so I'm hoping Australia brings us a bit of luck."
