Liverpool manager Brendan Rodgers said: "There has been dialogue all week. There is respect in terms of the traditions of both clubs.We want this day to be remembered for the right reasons before the game, and the footballing reasons.
"We want this day to be remembered for the right reasons before the game, and the footballing reasons. A lot of work has been done and hopefully Sunday will pass off peacefully and well and we can talk about the tributes and football.
"It is an emotionally-charged game. I wouldn't sit here and tell Liverpool supporters how to behave. I know how they have behaved over many years has been fantastic.
"These are well-educated supporters who value humanity. I have no issues or no problems there, the message has been clear, and from Sir Alex as well, in relation to his supporters. I am sure once we pay the tributes to the families we can get on with the football."
More top news
The boy was found unconscious and in cardiac arrest and was rushed to hospital where he died.
The victim, who was wearing her uniform at the time, was found knocking on doors nearly four hours after she was abducted.
There will be gales across Scotland and northern England this morning, but these will gradually ease through the afternoon.