He spoke candidly in his post-match debrief on BT Sport and responded emphatically when Des Kelly commented on his downbeat demeanour.
Tuchel said: "What do you expect from me? To smile? Of course, I am down.
Tuchel was also keen on focusing on their next match, which is against Southampton, with many trying to turn the spotlight on the return game against Madrid.
He added when quizzed on the second leg: "No, we don't have to go to Madrid we have to go Southampton and it is very important to process this. It is crucial that we go to Southampton. If we keep playing like this we will lose at Southampton and then we will get hammered at Bernabeu."
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