“I didn’t experience anything like this ever again or before,” he said.
“I can be very honest after that match I was two days in a very dark place and I can tell you I was not able to speak to anybody and to think about anything else than this defeat.
“It was in the circumstances, this game, how we arrived there, the pressure around the club concerning the round of 16, the history before and the result of the first match and the way the second match went with the VAR decision in the last minute.”
Tuchel said the crushing defeat helped provide the inspiration for PSG’s surge to last year’s Champions League final, adding: “It’s like this in sports – it can teach you that you have to stand up and accept that a defeat is sometimes necessary to grow and develop and to ask yourself decisive questions.
“That can hurt and the reward was one year later, it was almost the perfect reward when we arrived in the final and we came a long way for that.