AAP

Who leaked the email?

Some of Australia's Super Rugby coaches are annoyed and suspicious their collective Test selections have been revealed four days before the Wallabies' initial 25-man squad for the Lions series is unveiled on Sunday.

The Australian Rugby Union is also mystified as to how an email from Wallabies coach Robbie Deans to the five Super coaches, containing the 23-man team they would have picked through a regular selection exercise, fell into the hands of a News Ltd newspaper.

The leaked team showed the coaches, reportedly not including NSW mentor Michael Cheika who declined, didn't rate superstar convert Israel Folau or controversial Reds playmaker Quade Cooper as worthy of playing the three-Test series.

It's understood players were ranked on a 3-2-1 basis over a number of weeks until late last month.

Despite their strong recent form, Waratahs fullback Folau and Cooper were left out of the team while James O'Connor was named at five-eighth and suspended star Kurtley Beale was on the bench.

Three of the four coaches who responded were all disappointed and upset their views found their way into the public arena.

One could not be contacted.

"It's a process that we've done in the past each year and suddenly it's in the paper," one coach told AAP. "Our thoughts were requested back in March so some of the opinions are aged.

"To read it in the paper verbatim is frustrating.

"All we've tried to do is help the Wallabies with good intentions.

"Now to read it in the paper is very disappointing.

"It would be interesting to know how the information got out there."

Another coach confirmed Deans had apologised when it was brought to his attention the newspaper had received a copy of his email.

The provincial coach suspected it had been leaked mischievously - and did not rule out it being the misdeeds of a Super counterpart.

"You have to shake your head that this has been leaked by someone the day after it's been sent," he said.

"It's poor form.

"It doesn't help the relationship between the national coach and provincial coaches, and it's distracting for the players."

While the ARU denied the leak had come from within, one coach questioned the relevance of the selections considering Deans' strategy and tactics were not shared.

"It's very well asking what the Super Rugby coaches think but we all coach our teams differently," he said.

"If you know the strategy you might pick a different team."

Among other notable selections was the choice of Liam Gill at No.7 ahead of Michael Hooper, at a time George Smith was largely regarded is ineligible, and Jesse Mogg at fullback.