With just one training session with his new players and the pressure already on ahead of the visit of Wolves on Wednesday night, Tuchel turned to experienced heads in favour of youth and left Mount - Chelsea's best player so far this season and captain for Lampard's final game - on the bench.
Asked to explain his line up, Tuchel told BT Sport: "Today the choices were totally unfair, how can I do a choice with one training where everyone was really focused and really open to all things we trained?
"It is maybe the most unfair lineup we ever do because there is no reason to give to players not to be in the lineup.
"In doubt we chose for a bit more experience today and in the moment which is not easy, we step in in the middle of the season.
"The place where we are is not the place we should be, the expectations are high, the tension is high so we went for a bit of experience."