Everton boss Roberto Martinez has criticised the conduct of Manchester United manager David Moyes over the pursuit of his players.
This week, Everton labelled United's £28million bid for Leighton Baines and Marouane Fellaini "derisory and insulting.'
Moyes later suggested Everton should let the pair leave Goodison Park for the good of their careers.
Speaking after Everton's goalless draw with West Brom, Martinez said: "I think my comment is quite clear. If managers start talking about players who are registered at other clubs, that is the end of the whole thing.
"I think everyone should look after their own things internally. The business should be done quietly. It is really unfortunate when you read papers and people talk about your players.
"I could sit down and give you half an hour with my vision of how the other club is being run, the players they want to go and how they should be sending messages to all the clubs around the world that they have been trying to sign players and haven't been able to do it.
"Everyone has got a price (but) when you invest money in a player and five years later you get offered the same money after performing really well, that becomes a little bit of a nonsense.
"The last thing I want is to get into a media war with a manager I really respect."