Leeds United has denied reports that the club's Australian midfielder Harry Kewell is to join premier league rival Manchester United next season.

Club officials were astonished by a report in British newspaper the Daily Star that the two clubs had agreed Kewell would move to United for STG6 million ($A15.6 million).

Leeds said there had been no bid made for Kewell or any other player, including his Australian team-mate Mark Viduka.

Kewell's manager Bernie Mandic said the ongoing speculation on the 24-year-old's future was getting out of control.

"I've taken the view from this point on to make no comment on speculation on Harry's future. It's just getting a little out of hand," Mandic said.

"Rather than feed the speculation, we won't make any comment."

Kewell returned from a back injury with two goals in Leeds' 6-1 demolition of Charlton at the weekend, easing the troubled club clear of the relegation zone.

Speculation has been rife throughout Leeds' dismal season in which the club has sold many of its leading players, plummeted toward relegation, sacked coach Terry Venables, seen chairman Peter Ridsdale quit and reported debts of STG70 million ($A182 million).

Kewell has been linked with Manchester United as well as several European clubs including Roma and Real Madrid.

Mandic indicated a fortnight ago that Kewell was likely to sign a new deal at Leeds following productive talks with Ridsdale, who had reportedly prepared an $A8 million-a-year, four-season deal.

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