The Bournemouth boss pointed to four incidents across the 90 minutes, with two penalties being awarded, one for each side.
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The first saw United took the lead through Bruno Fernandes as Alex Jimenez pulled down Matheus Cubha, before Junior Kroupi equalised at 2-2 after Harry Maguire fouled Evanilson, with the United man also sent off.
Iraola said another incident of Maguire on Evanilson in the first half, and a challenge from Adrien Truffert on Amad Diallo before Bournemouth’s first goal did not have enough contact to be awarded.
Bruno Fernandes converted from the spot for United. (Image: Richard Crease)
Asked about the two given penalties and the Amad incident, Iraola said: “I would add another incident.
“I think there are four incidents, and I think the two penalties they've called are clear penalties. I think the defenders in both situations, they lose their position and they have to commit the foul.
“The Amad penalty, I don't think it's a penalty. There is no contact at all, and he goes to the floor, it’s very light.
“We complained also about the first half, two hands behind the back, Maguire against Evanilson, but I don't think it's enough also the same way to call a penalty.
“So I think the decisions in the four cases have been correct after reviewing, because I've had time to review them, and at least in the big decision, I think they've got it right.”