Bruno Lage and Ruben Neves were unhappy with the officiating in Wolves' 1-1 draw with Newcastle United on Sunday.
Allan Saint-Maximin scored an equaliser in the 90th minute for the visitors.
But Lage and Neves believe the Magpies should have been down to 10-men after Fabian Schar's tackle on Pedro Neto.
Lage said: "Ninety percent of the people after watching the image would say it's a red card. But the referee and the VAR take another decision. It should be a red card in my opinion."
Speaking to Sky Sports, Neves said: "At the end it is details. Maybe a detail when Neto almost broke his leg and the ref didn't run to the screen, that is one detail. Another detail is we score a second goal and the ref run to the screen.
"A lot of meetings before the season starts every-time, but then when you see our player almost breaking their leg from that tackle, and the ref doesn't go to the screen, we ask why we do so many meetings."