Wolves boss Gary O'Neil described the behaviour of Coventry counterpart Mark Robins "disgusting" after he celebrated his side's remarkable FA Cup quarter-final win in the face of a 13-year-old ball boy.

The Championship outfit stunned their Premier League opponents with two goals in added time to seal a 3-2 victory and book a first semi-final in this competition since they won it in 1987.

It was after Haji Wright's winner at the death that Robins showed a rare sight of emotion by celebrating in front of a ball boy, who had irked him moments before.

Robins offered an unprompted apology in his press conference after the game, but O'Neil said the teenager was left distressed.

The Wolves boss said: "I was disappointed, I waited for Mark downstairs and spoke to him because I was really respectful at the end having lost a massive game, waited for them to finish their celebrations and congratulated them on a real good performance.

"And he apologised, but to celebrate in a young boy's face like that I thought was disgusting, the boy is really upset. It shouldn't happen, but I don't have too much to say about it because we have lost and it's going to seem bitter.

"But I thought it was really important to speak to Mark about it because they are just kids doing a job."

Robins was regretful afterwards and admitted to letting his emotions get the better of him.

He said: "I have an apology to make, before the winner went in, the ball boy has the ball, a young kid, so I am apologising to him, he has the ball in his hand, drops it and walks away smiling.

"It really annoyed me, but he's a kid, at the end of the day I have reacted, we scored the goal and I went and celebrated in front of him.

"I apologise to him. I do not show emotion very often and before that happened I apologise to him, I don't show emotion very often but that is what the FA Cup does to you."