Three prominent St Kilda players told an investigation of the hurt they would feel if allegations against disgraced AFL player manager Ricky Nixon were proven.

Saints captain Nick Riewoldt told the investigation he would want to punch Nixon's lights out if it was shown the manager had sex with teenager Kim Duthie.

Defender Sam Gilbert said he would consider a relationship between Nixon and Duthie a breach of trust, while midfielder Nick Dal Santo felt the manager's ability to look after his interests would be compromised.

The statements by the Saints players, all Nixon clients, were contained in a confidential report that was leaked to Fairfax Radio this week.

The AFL Players' Association commissioned David Galbally QC earlier this year to compile the report, which investigated explosive allegations that Nixon had sex with Duthie.

She was the teenager at the centre of the St Kilda nude photo scandal.

The report found that Nixon had sex and took illicit drugs with Duthie in a Melbourne hotel room, Fairfax Radio said.

After Galbally submitted his report, the association stripped Nixon of his player manager accreditation for two years.

Nixon declined to appeal against the ban, which effectively ruined his prominent career as a player manager.

He continues to vehemently deny having sex with Duthie, only admitting to an "inappropriate relationship" with her.

According to Fairfax Radio, Riewoldt told Galbally that if Nixon was found to have had sex with Duthie, he would be "completely let down and would believe the handling of the photo incident had been jeopardised".

The report also reportedly states: "If he (Riewoldt) was in a room on his own with Nixon he would punch his lights out".

Riewoldt reportedly also told the Galbally investigation he thought Duthie was "psychotic" and that he did not believe allegations that she had sex with Nixon.

Late last year, Duthie stole nude and semi-nude photos from Gilbert's laptop and published them on the internet.

The photos featured Riewoldt and Dal Santo.

Earlier this year, Nixon and Duthie met in a Melbourne hotel room where she was staying.

The report said Victorian Police forensic experts had proved damning video and text message evidence was genuine.

Duthie had claimed she secretly shot video footage of Nixon in his underpants in her hotel room, while the police also examined about 900 text messages between the pair.

The nude photo scandal and its repercussions have been an ongoing nightmare this year for the Saints, who made the past two grand finals.

They only have a win and a draw from their first five matches.

On the weekend, coach Ross Lyon admitted the scandal had affected Gilbert's on-field performance so far this season.

On Thursday, players' association chief executive Matt Finnis said it was "really disappointing" the Galbally report had been leaked.

"People have volunteered information as part of an investigation ... they were entitled to feel comments they made would be treated in confidence," Finnis said.

When asked how his players would feel about the report being leaked, Lyon replied: "Life is full of disappointments.

"Is it ideal? No. Is it going to distract us? The aim is for it not to - if anything, it really stimulates some focus on what's important."

Lyon said the ongoing ramifications of the nude photo scandal were a test for St Kilda.

"This is a period where we'll find out about our individual and club character and the aim is to work through it and eventually come out on top," he said.

"We're all big boys, we understand the challenges and pressures - if you don't like it, pack up and leave.

"But that's not where we're at."

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