The 30-year-old also agrees with fellow countryman Brett Emerton, who expects many of his Socceroo team-mates in the over-30 age bracket to play on after the encouraging conclusion to the campaign in South Africa.
Cahill said on Everton's official website: "I'm a very proud Australian. I have played a lot of games for this country and put my body on the line and I give everything. I'll keep playing for as long as I can. The only thing that will stop me is serious injury."
He added: "We deserved that win (against Serbia), we came back in the Ghana game and showed our spirit. We're a great group of lads that really care for each other. I'm just proud to be part of this team.
"Four points in a competition like this is exceptional and we won our last game against a very good team. We were very unlucky not to go through."