Under-pressure Thorpe defends the cost of his comeback

Already under enormous pressure to break into Australia's Olympic swimming team as the headline act of this week's national trials, Ian Thorpe was forced to wade into controversy on Wednesday over preferential payments made to marquee swimmers.

Local media have reported disaffection within Australia's swimming ranks over alleged preferential funding benefiting former Olympic champions on the comeback trail like Thorpe, Michael Klim and Libby Trickett in the days leading up to the trials that start on Thursday.

Reports have questioned the value of funding Thorpe's comeback ambitions, which has entailed providing individualised training overseas in Switzerland and the Middle East, while other front-line swimmers have trained at home and shared coaches.

Thorpe denied receiving preferential funding, which local media have estimated cost Swimming Australia A$150,000 -- up to 10 times the amount given to other swimmers.

"Firstly, I haven't been paid a cent," five-time Olympic champion Thorpe said at the South Australia Aquatic and Leisure Centre, the venue for the trials that start on Thursday. "It's been clarified by a number of people that what's been reported isn't factual.

"There's been a number of athletes who've been Olympic champions or World record holders who have been supported by Swimming Australia.

"The funding that's come from that is not dissimilar as to what's been funded for other people in this sport.

"There hasn't been any preferential treatment, as such, given.

"There may be a higher cost because I'm training outside (Australia) and it's not shared amongst a number of athletes, that's it."

Thorpe, whose image dominates promotional material at the meeting and around South Australia's state capital, has attracted a huge media presence to the trials, despite the swimmer all but writing off his chances to make the team.

Swimming Australia has conceded Thorpe's programme overseas may have cost more than preparing domestically-trained swimmers but has pointed to the raised attention the swimmer's comeback has brought back to the sport.

A flop of their headline act in the trials would nonetheless be an embarrassment for the governing body, whose head coach Leigh Nugent has backed Thorpe to the hilt and shot back at critics that have said the swimmer left his run too late to be fit for London.