"Jon Moss said it was a blatant penalty and should have been given - fair play to him, he apologised," said O'Neil after the match, which United won with Raphael Varane's 76th-minute header.
Wolves boss Julen Lopetegui to BBC Sport: "Always to have one point more is important. It's very difficult here against a very good team.
"We have overcome one bad moment when they were winning 1-0.
Wolves manager Julen Lopetegui, speaking to BBC Match of the Day: "We have lost three important points against a big team, but I am angry above all because we didn’t deserve to lose.
Wolves manager Julen Lopetegui told Sky Sports: "In the first half they worked through us.
"For me, we should have had a penalty. We are very unlucky with the referee. We were unlucky against Liverpool and then again today.
Wolves caretaker boss Steve Davis to Sky Sports: "It was disappointing, I share the pain with the supporters, Defending was poor, we haven't done well enough in our box and we weren't clinical enough in their box.
Wolves boss Bruno Lage: "It was a mistake with the ball [for the opening goal].
"After that we had good moments with the ball. We tried to create chances. We didn't have the chance and they scored a third to finish the game.
Wolves boss Bruno Lage, speaking to Sky Sports: "We did a good game, the way we started and wanted to press. First half we controlled everything, especially the way Newcastle play. The way they scored the goal at the end of the game, and to be honest we deserved more the three points - it is hard.
Tottenham boss Antonio Conte: "The performance at the end was good because I had to consider everything. First of all Wolves, they signed some important players and if you see their starting 11 you have to be a bit scared because they have one of the best midfields in this league.
"I think we did a good game," Lage said. "I think we were the better team, we created a lot of chances, and we didn't score. I'm happy with the performance, but not happy with the result.
Liverpool boss Jurgen Klopp tells BBC Sport: "I know Manchester City won 3-2 but I have no idea about any other result. Congratulations to Manchester City, Pep Guardiola and all the supporters, we made it a tough race but you fought hard, we fought hard but this game was not the pinnacle of our skill set.
Wolves boss Bruno Lage to BBC Match of the Day: "We are frustrated with the result. It has been easy to score goals against us in the last months. We tried to do our best; we changed the dynamic a bit, scored one and should score more.
Wolves goalkeeping coach Tony Roberts: "We came back to get the point but we're disappointed we didn't win it. We had opportunities from set-pieces in the first half but this group has great spirit so to come from 2-0 down here, what a result.
Wolves manager Bruno Lage said: "One more great performance from us, especially in the first half. We were creating a lot of chances and I thought we were the better team and we played the game the way we wanted.