Reports on Thursday morning claimed the Scottish champions were prepared to offer the former Leeds player £40,000 a week to join the club.
Bernie Mandic, Kewell's personal manager, declined to comment on the player's future.
Kewell will be released by Liverpool this summer after a five-year spell at Anfield which has been largely ruined by injury.
The 29-year-old has recently been linked with moves to teams including Portsmouth and Juventus.