Everton manager Roberto Martinez accused Chelsea's players of trying to sway the referee in their favour during a fiery affair against the Toffees at Stamford Bridge on Wednesday.
Chelsea ran out 1-0 winners courtesy of a late strike from Willian, which came after Gareth Barry was sent off and Branislav Ivanovic escaped punishment following a clash with Everton midfielder James McCarthy.
While the game appeared to be petering out to a stalemate, Barry tripped Willian and was giving a second yellow card and his marching orders.
Both sets of players clashed after this incident, including Ivanovic locking his arms around McCarthy and then clearly appearing to head-butt his opponent.
Martinez was not happy with referee Jonathan Moss for the way he handled both decisions and suggests he was swayed by Chelsea.
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Speaking to the BBC, Martinez said "It's very clear that what the home team are trying to do is influence the referee."
"To give Barry a second yellow just because of the reaction of the Chelsea players, that is disappointing.
"You don't want to believe that that decision is given because of the reaction of the players. It's something that we constantly see here. We have to allow the authorities to look into it.
"Ivanovic's behaviour is wrong. He grabs McCarthy around his neck in a very forceful manner, then puts his head against him. James McCarthy doesn't react a single bit.
"If you want to be on top of the law, that's a red card and we got nothing out of that moment."
Jose Mourinho decided to go quiet again after just returning from a self-imposed 10-day media boycott after accusing the press of influencing the FA's decision to punish Diego Costa for his obvious stamp on Liverpool's Emre Can.
The Chelsea manager was asked about the incident, he decided to walk out of the interview, telling Jonathan Pearce: "Sorry, see you tomorrow."
This is by far not the first time Ivanovic has been accused of violent misconduct on the field after appearing to strike Hull's Liam Brady and Southampton's Shane Long in separate incidents.
Willian's late goal keeps Chelsea seven points clear at the summit of the Premier League.