Tuchel rested Mario Gotze, Marc Bartra and Pierre-Emerick Aubameyang for the Bundesliga match at Signal Iduna Park, while Lukasz Piszczek missed the diversion because of damage.
Be that as it may, Dortmund's rising adolescents took their risk in determined style, any semblance of Christian Pulisic and substitute Emre Mor specifically tearing separated the guests, who had chief Peter Niemeyer sent off for a brief moment bookable offense just before the hour mark.
"That was in all ranges a truly balanced [performance]," Tuchel told a news gathering.
"We controlled the amusement in each stage and accordingly won deservedly.
"We had 22 shots on objective, delivered numerous assaults, were forceful in the last third and before the restriction's objective."
Adrian Ramos and Ousmane Dembele joined with Gonzalo Castro and Pulisic overwhelming everything in the vicinity, Julian Weigl pulling the strings from midfield and Raphael Guerreiro specifically getting the attention on a vital day for Dortmund, who experienced little difficulty separating the massed positions of Darmstadt's backline.
"Playing against a five-man barrier is the most troublesome [task], in light of the fact that you require rate and tolerance furthermore fearlessness for one-on-ones," Tuchel said.