Referees chief Howard Webb says Michael Oliver was wrong to send off Arsenal youngster Myles Lewis-Skelly against Wolves last month.
Lewis-Skelly was shown a red card for tripping Matt Doherty before halftime in Arsenal's 1-0 win at Molineux.
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Arsenal appealed the decision - which was eventually overturned.
And Webb admits a yellow card would've been a better decision from Oliver on the day: "From the outset, we would prefer a yellow card in this situation."
However, he also told Sky Sports: "I've heard this described as a really horrendous officiating decision. It's not. I understand why the referee saw this on the day as a serious foul-play action."