Boro fan coming in peace here.
I can't believe some people say it could be a yellow card not a red, although most accept it was a red.
If you go in studs showing in that manner on someones leg, its a red card no question, so how is there any doubt 6 ft in the air with someones face its a red card or not?
There's no way to prove it but as a fan watching, especially the rest of the first half, the incident made me totally switch off from the game and my head wasn't in it. I can only imagine how the players felt seeing it happen to a team mate and for me, I think it effected both teams in the first half.
I think we came out the 2nd half probably after Dael had said to go out and win it for him, wanting it more and the better team, then the goal totally deflated that momentum and we could have lost by more.
The point is forgetting the penalty and red card, I think the incident massively changed the game psychologically for the players - although I can't prove that and we were terrible in our last game against Birmingham so we'll never know.