Opinion or not, according to the rules set out, this is a challenge they are trying to iron out. Udogie and havertz both should’ve been sent off. My opinion is that both are yellows as no contact is made however that’s not the rules.
Edit: I know havertz made contact but it was the trailing leg that did contact which was at foot height which is far less dangerous.
As a Arsenal fan, love it. As a car guy, hate it. I’m gonna side with my Arsenal side