Doyle scored in Sunday's 2-0 home win over Fulham to maintain Wanderers' 100% start to the Barclays Premier League campaign and has been linked with a move away from the club, but as far as McCarthy is concerned, trading should have already ceased, and he has absolutely no intention of entertaining offers for the Republic of Ireland striker.
McCarthy said: "I think the end of the transfer window should coincide with the start of the season. We have started well, but can you imagine what that would do if someone took one of my best players away - not only to me, but to all the other players, to the club? It would just rip the heart out of it."
He added: "Somebody like (summer signing) Roger Johnson has come here with the belief that we were keeping all our players - Jamie O'Hara is the same.
"I don't think it's going to happen, but I would be telling them to get lost."
Juventus, Arsenal and Liverpool are reported to be interested in Doyle, who insists the speculation will not affect his game.
Speaking to the Express and Star after Sunday's match, Doyle said: "It didn't put me off at all - it was funny.
"It was better being linked with those teams, I suppose.
"I will just get on with things. The manager and the lads have a laugh at me."
Source: PA
Source: PA