An animated Tuchel ran down the sideline after the decision. After the match, he told broadcaster DAZN the decision was “a disaster, an absolute disaster”.
“We have to let the action play out until the end. That’s the rule, especially since it’s so close to the goal, and it’s so limited.
“The first error is made by the linesman, the second comes from the referee,” Tuchel said.
The 50-year-old coach told broadcaster TNT the decision “felt like a betrayal”.
Speaking at the press conference, Tuchel said the referee apologised but added: “It doesn’t help to say sorry.
“Everyone has to go to their limit, everyone has to suffer, everyone has to play without making mistakes. So the referee has to be at that level too.
“It just doesn’t help to make excuses after the fact.
“You are on the field for this reason, because you are the best there is. And we have the right to expect that until the end.”
The goalscorer De Ligt agreed with his coach, calling the decision decisive in the match.
“The scene at the end, I find it incredible. I can’t understand why he (the referee) doesn’t let the action play out.
“He apologised. I wouldn’t want to say that Real are always lucky, but that decision makes the difference today,” De Ligt told DAZN.
A disappointed Bayern captain Manuel Neuer said: “We’re in the Champions League semi-finals… I think he knows it was a mistake and that you shouldn’t make a decision like that so quickly.”