Simone Inzaghi was left bewildered following Lazio's 3-1 defeat by Torino where Ciro Immobile was red-carded.
Immobile was dismissed on the stroke of half-time for violent conduct – for appearing as is he was going to headbutt Nicolas Burdisso – ahead of goals from Alex Berenguer on 54 minutes and Thomas Rincon ten minutes later.
Luis Alberto pulled a goal back for Lazio with 69 minutes on the clock, only for Simone Edera to net a 73rd-minute winner.
Inzaghi, who also criticised the lack of a penalty for his side after Iago Falque had handled in the box, said he was "left feeling defrauded" after the game.
The manager told Mediaset Premium: "The images are clear. I can analyse the first half, but in the second it was decided by the referee, his collaborators and VAR.
"We should’ve done better in the first half, we created a few chances and Torino also had their opportunities."
Inzaghi added: "We had the feeling we could get the victory, but for the fourth week in a row, we were left feeling defrauded. It’s a series of incidents that really makes you think. You all saw it.
"It was the hardest half-time talk I’ve had in my coaching career, because it didn’t seem right to deny the evidence in front of my lads.
“I asked Burdisso why he hadn’t told the referee that there was nothing in it and he replied that he had told the officials that. I hope there will be an appeal and they can see there was nothing in it.
“We should’ve done better and taken the lead in the first 45 minutes, but when certain things happen, it’s really irritating. I was able to calm the team down and talk about the pitch situation for three times, but the fourth was tough."