Kewell said: "Liverpool have given their full support for me to go there, but I've been told by two doctors I wouldn't be advised to go on a plane for that long because it would swell up."
"I'm carrying a bit of a knock and it just wouldn't do my career any good just for a friendly.
"I've got nothing to hide, Frank Farina's got no problem with it and I'm sure the Australian medical team have got no problem with it because they know what I've played with before."
