Tuchel insists his side will not sit on their lead, having already shown his attacking intent when bringing on Olivier Giroud and Christian Pulisic in a bid to extend Chelsea’s advantage going into the second leg.
“I wanted the sign,” he said. “I accepted that it was a tough match for Timo [Werner] and for Kai [Havertz]. They had not their best day and we did not deliver so good, so we lost a bit the connection to them.
“The balls we delivered were not the best balls and I could feel our two German players up front, Kai and Timo, do not play on their highest level so I wanted to have an impact from the bench. We wanted to give the sign that we keep on going. This is the mentality in general that I like about this club and this team and that we want also to implement.
“It is very hard that once you lead, that you do not play with a mentality of ‘now we have something to lose, let’s keep what we have’.
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“The best way to defend is to attack. The best way to impress the opponents is to have ball possession, to be courageous and to always be a threat.
“The job is half done and we are aware of that and we need another top performance on Tuesday.”
Tuchel added: “We experienced what can happen in football last Saturday.
“I feel a good atmosphere in the dressing room, happy but not too happy, excited but not too excited.
“We made a few good attacks and got two good goals, and it was hard for us to create touches in the box, find the right rhythm for a long time. Overall we escaped with a very, very good result.
“But it’s the quarter-finals and we have to keep on going, it will be necessary for another top performance and top mentality.”