Referee Wolfgang Stark admitted he had made a mistake in sending off Borussia Dortmund's Marcel Schmelzer and awarding a penalty in the Westphalian club's 3-2 home defeat to Wolfsburg on Saturday.
Schmelzer was given his marching orders for handball, with Diego sweeping in the spot-kick to make it 1-1.
And Stark admitted after the game it had been an error.
"I am sorry, but it was an error in interpretation from me," he said. "We have taken a look at it again in the dressing room, together with the referee observer.
"During the game, to me it seemed a clear handball on the goal line, so penalty and red card.
"Unfortunately, the pictures speak a different language. It shouldn't happen, but it has happened.
"The penalty and the red card were mistakes."
The admission does not help Dortmund get over their second home defeat of the season, though, as their deficit on league leaders Bayern Munich grew to 14 points.
"We have a case here where Stark has completely decided this game against us with his refereeing and that is obviously hard to accept," said the club's director of sport Michael Zorc to Sky television.
Coach Jurgen Klopp added that Schmelzer "should receive the peace prize" for his reaction to the injustice as he left the field with little complaint, but he also felt it was a mistake which should never have been made.
"I was certain it wasn't handball from where I was standing - his arms were attached to his body," Klopp said.
"We're not at the point where players have to saw off their arms to avoid handball, yet.
"The way this result came about is brutally hard for us to accept."
The 32-year-old England stopper made the switch from West Ham in July having helped the Hammers win promotion back to the Premier League.
However, QPR's decision to sign Brazilian Cesar from Inter Milan a month later came as a huge shock to Green, who soon found himself playing a bit part under manager Mark Hughes.
"I came to QPR looking for a new challenge after six years at West Ham, a wonderful time capped off by promotion at Wembley," Green told the Mail on Sunday.
"Kevin Hitchcock, the goalkeeping coach at QPR, is an old mate and I came to work for him on the understanding that I was first choice.
"If he'd said to me we're also going to sign someone who's won Serie A five times and the Champions League and is one of the biggest names in South American football, I would have thought twice before signing.
"I'd read rumours in the press about Julio coming, but when I asked officials at the club they dismissed it as paper talk and said he wasn't going to sign."
Green admitted the three months that followed Cesar's arrival were among the hardest of his career.
"Now that the Brazilian had joined the club I needed to know where I stood," he said.
"I asked Mark Hughes. He told me Julio was going to play, that I'd done nothing wrong and that he wanted two top keepers competing for the position.
"I replied, 'Well, if he's going straight into the first team he's not really competing, is he? Where does that leave me?"'
"Hughes replied, 'You're free to leave whenever you want'. It wasn't quite what I wanted to hear."
Hughes' dismissal last month, and an injury to Cesar, have finally allowed Green a chance to show what he can do between the posts.
And the goalkeeper is hoping he can make an impression on new boss Harry Redknapp.
"I'm in the jersey now and it's up to me to play well enough to keep it," he said.
"I believe Harry when he says it's a fair fight on form alone so we'll see how it all turns out."
