Manchester United hosted Crystal Palace in a Premier League clash.
With sides around them dropping points over the weekend, it was imperative United picked up the win.
However, Crystal Palace are a tough side to beat and recently held the Red Devils to a 1-1 draw.
On Saturday, though, Manchester United came away with a 2-1 victory.
It was not all good news for United, however, as Casemiro was shown a straight red card 70 minutes in.
This means the Brazilian will miss United’s next three games, which are against Leeds (twice) and Leicester.
“First of all, we have to deal with it and we will do, but it is not right,” Ten Hag said. “It shouldn’t have happened. And last week, VAR doesn’t do anything about the tackle (on Christian Eriksen by Andy Carroll), but this was avoidable and because in this incident there have to be consequences and they are inconsistent and that is not right, that is not fair against us.
“We have to think about [appealing]. But be fair, we have seen when you’re freezing (the frame), Casemiro is crossing the line. But many more players were crossing the line there.
“We get also some warnings about our team reacting like this and I think you have to do it, you have to protect each other but we want to keep our standards and values at Man United, keep them high.
“We can’t cross lines but we have to stick together and, yes, we have to stand for each other, yes.”
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