Tuchel said: "We are almost through, it's almost there and there was a very unusual mistake from our best player for the equaliser then we conceded the second one in stoppage time.
"Then we scored one and there was a disastrous decision from the linesman and the referee. It feels like a betrayal in the end. There was a huge fight, we left everything on the pitch and we were almost there. Now we say congratulations to Real Madrid.
"The linesman says sorry but that does not help. To raise the flag in a moment like this... The referee sees we get the second ball and we get the shot - it's a very, very bad decision. It's against the rules. It's a disaster. It's hard to swallow but that's the way it is.
"Yeah I felt more and more (in control) in the second half. You are never fully sure because it's Real Madrid in Madrid. We could have been more clinical or calm in the opponent's half. We started with a front four and all four has to go out with injury or cramp.
"Yeah because if you are through in the 88th minute you see the end of the tunnel. Was it our very best match? No. But we didn't need to be perfect, we just needed to be good enough in this moment. In the moment when we had one player out with cramp, we conceded a goal we never usually would with our goalkeeper. You have to accept the result in the end."