Liverpool manager Brendan Rodgers has questioned Sir Alex Ferguson's decision to release a tell-all book.
Ferguson's new autobiography reveals his thoughts on a number of issues - including his relationship with star players such as Roy Keane and David Beckham.
Liverpool are heavily criticised in the book - with Ferguson questioning the way in which the north-west club handled the Patrice Evra-Luis Suarez affair.
The 71-year-old is particularly critical of Liverpool's hierarchy, who publicly backed the Uruguayan by allowing their players to wear Suarez t-shirts during their pre-match warm up against Wigan Athletic.
Ferguson's comments have irked Rodgers, who has condemned Ferguson for speaking out on private affairs.
Rodgers, speaking exclusively to talkSPORT, said on Ferguson's new autobiography: "Anyone who’s been in football knows that whatever is said behind closed doors and in the changing room is something you wouldn’t want to hear again.
"It’s something that’s vitally important. You want to know as a human being that you can speak openly and communication is honest, and hopefully wouldn’t get repeated.
"It’s certainly something that in modern time is becoming more difficult. I always felt that years ago you could say those sorts of things, that people were open and honest, but that it would get left behind and you move on.
"As time goes on and all the social communication and technologies come along it makes it that bit more difficult.
"You would like to think you would still have some old school values and ethics that whatever is said you take it on the chin and keep it behind closed doors and move on."
Rodgers was also disappointed with Ferguson's assessment on Liverpool star Steven Gerrard.
Ferguson claimed he did not think Gerrard was a 'top, top player' - despite previously admitting that he tried to sign the England captain.