The Australia international is under an injury cloud for the finals in South Africa but he is keeping an optimistic outlook despite aggravating the problem at training during the week.
"It [the injury] is still there a little bit so we're taking precautions now," Kewell told The Daily Telegraph.
"The season's pretty much done for us. We can't win the league or come second.
"Hopefully I can play in our last game, against Genclerbirligi. The plan is to train this week and see how I cope. If I don't play, then it's not meant to be. I'm still resting these old legs. There are still a few more games [for Australia] before the World Cup.‚ÄĚ
Kewell added that he didn‚Äôt think the World Cup would be his last duties for the Socceroos as he plans to continue playing for both club and country.
"I don't think the World Cup's going to be my [Socceroos] swan song. I'll play football for my club and country as long as I have the desire to play football, and for as long as I feel I can do a job for both club and country," he added.
"Playing in the Asian Cup's always a possibility. It's in a country that's not far from Turkey and it's not far from England, if I'm back there.
"I always keep my options open."