"I've got a contract until the end of the season and I'm still fighting for another one at Liverpool," Kewell told the Liverpool Daily Post. "I've got the Aussie spirit of never say die and I'll take that all the way to the end. I won't give up until the final whistle.
"The best thing for me is to get some games so I can be fighting fit for Liverpool. There's a chance here to play two games and the manager was very happy for me to come across.
"I've just got to play football. I've been through some good times and bad times and I've realised now that just want to enjoy my football. That's the important thing."
Celtic have been linked with a possible move for Kewell in the summer, but the winger says he is unaware of any interest from the Scottish champions.
"It's the first I've heard of it and I've heard a lot of things in my period in football," added Kewell. "There's a lot of fantastic clubs out there, but for now my goal is on Saturday and then China."