Jose Mourinho wants to know why Chelsea are, in his opinion, treated differently when it comes to disciplinary matters after highlighting an elbow incident involving Manchester United striker Robin van Persie.

The Blues boss has questioned the consistency of the Football Association's disciplinary department, suggesting had a Chelsea player used his elbow in the same way Van Persie did at West Ham last Sunday he would have been banned.

Mourinho said: "The same people (the FA) that suspended my player (Diego Costa) didn't want to suspend a player this weekend.

"And they could. This weekend a player could be suspended and he wasn't."

When asked which player he was referring to, Mourinho gestured with an elbow in a clear reference to Van Persie's challenge on Hammers defender James Tomkins, an incident was dealt with by the match officials, so cannot be subject to retrospective action.

"I know that if it was one of mine, I know," Mourinho added.

"Last season happened the same thing, when Ramires was suspended (for elbowing Sunderland's Sebastian Larsson).

"It was exactly the same thing. A Manchester City player kicked a player on the floor at Norwich and nothing happened."

That was a reference to Yaya Toure's challenge on Ricky van Wolfswinkel, which went unpunished.

United manager Louis Van Gaal defended the conduct of his player at his press conference on Tuesday. When asked whether he thought Van Persie deliberately elbowed Tomkins, the Dutchman said: "No."

Mourinho also declined to comment on Leicester boss Nigel Pearson avoiding sanction for his touchline grapple with Crystal Palace midfielder James McArthur – "I have only thoughts about myself, not about Nigel," he said – but did wonder how Arsenal manager Arsene Wenger avoided punishment for pushing him at Stamford Bridge last October.

Mourinho repeated his claim made two weeks after the incident that he would have been given a stadium ban had he been the perpetrator, rather than the victim, of Wenger's push.

"If I push a manager in my technical area, you know that I will be stadium banned," Mourinho said.

"We all know. Why? We don't know. You can't say we don't know why, but I think we all know that if I do something like that I would be serious, serious trouble."

The Blues boss was fined B£25,000 last month for saying there was a "clear campaign" against Chelsea after the December draw at Southampton.

Mourinho is not the only manager to have his comments scrutinized as Manchester United boss Louis van Gaal was charged for his comments after the FA Cup draw at League Two Cambridge.

The Chelsea manager added: "I can be very defensive and say nothing, or I can be myself and say what I feel.

"And then there is a line where you never know the way they (the FA) analyze it and they think you can or can't say that.

"Press conferences, especially after matches, are very, very difficult for us."

Mourinho learned of his fine on the day Costa was charged for treading on Liverpool's Emre Can.

The striker was given a three-match ban, missing matches with Manchester City, Aston Villa and the final game of his suspension is against Everton on Wednesday night.

Mourinho's mood has lightened since opting out of media duties surrounding the draw with City on January 31.

"I needed a little bit more time to forget why my player (Costa) was suspended," Mourinho said.

"I need a little bit more time to understand why some people are punished, others aren't."

Mourinho suggested Sky Sports – and in particular pundit Jamie Redknapp – contributed to Costa's ban for their coverage of the incident.

And he joked similar analysis was not undertaken of the Van Persie incident, saying: "I was told they had a technical problem.

"The replays were not coming. The problem was not the pundits, but the technical side of things."

Chelsea drew with City and secured Mourinho's first win at Villa Park last weekend in Costa's absence.

"With him could be even better," Mourinho said.

Midfielder John Obi Mikel (knee) is the only definite injury absentee for Wednesday's match, but Cesc Fabregas (hamstring) is fit again.

The Everton contest sees the return of Romelu Lukaku to Stamford Bridge after the Belgium forward struggled to break through into Mourinho's plans and was sold last summer.

Mourinho said: "Nobody has doubts at Chelsea that he's a good player. We know Romelu is a good player. (Andre) Schurrle is a good player, (Kevin) de Bruyne is a good player, (Juan) Mata is a good player.

"We don't sell garbage. We sell top players, we get top fees. (Without) top fees we don't sell them, we keep them."

Chelsea have no intention of parting with Eden Hazard, Lukaku's compatriot, whose contract negotiations are ongoing.

Mourinho is relaxed about Hazard's new deal, saying: "I'm buying a nice pen. I need a bit of time to go to Sloane Street to buy a proper pen."