Jose Mourinho and Roma were left furious after their 0-0 draw with Genoa.
Nicola Zaniolo thought he had scored a 90th-minute winner only for it to be disallowed following an on-field VAR review of Tammy Abraham's challenge on Johan Vasquez.
The Italian then continued his protests and was sent off for dissent moments later.
I spoke to the referee, because in my opinion he got it wrong," added Mourinho in his press conference.
“Do you think if Zaniolo played for Inter, Juventus or Milan, the same situation would've developed? He hasn't been given a penalty all season, he gets fouled constantly, he opens his mouth and is automatically booked. He's had seven or eight yellow cards and two red, a creative player like Zaniolo.
“Today Zaniolo was sent off because he said three times to Mr Abisso: 'Why the hell did you whistle?' He said it three times in a row, but it was not an insult.
“If I am a referee, after someone celebrates at the 90th minute, sees the goal disallowed, is naturally frustrated, you can book him and that's that.
“Do you think that red card would've been given, for example, to Lautaro Martinez for Inter at San Siro? Or Giorgio Chiellini in the Juventus Stadium? Or Zlatan Ibrahimovic at San Siro?
“What the hell did you whistle gets a red card. This is where we are, we are considered a small club. Maybe it's not even his fault, maybe the referee is just following the guidelines he is given for modern football by the professors in charge."
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