Arsenal boss Arsene Wenger felt his team suffered from poor officiating during the 2-1 defeat by Chelsea at Stamford Bridge.
Wenger was livid on the touchline as Juan Mata broke the deadlock moments after Ramires appeared to foul Francis Coquelin.
And his anger increased when Gunners goalkeeper Wojciech Szczesny was adjudged to have brought down Ramires in the box.
Ramires appeared to slip as he tried to twist past the keeper, and Wenger believes the Brazilian should have been booked for diving.
Wenger said: "The referee gave a lot of free-kicks today, and some much less than the Coquelin one. It's frustrating.
"It doesn't mean we should have conceded the goal but, in the big games, these decisions have big implications.
"He could have given Ramires a yellow card as well."