Aubameyang body language not good - Dortmund boss Tuchel explains substitution

The Portuguese have had lady luck on their side during the group stage, enabling them to proceed to the last 16.

Borussia Dortmund have qualified for the Champions League knockout stages in each of their last four participations, finishing top on each occasion.

The German giants have been wildly unpredictable this season but they have put on their best performances in the big games.

Dortmund fielded three teenagers at Darmstadt, with 18-year-old Dzenis Burnic making his German league debut in the absence of injured defensive duo Marcel Schmelzer and Lukasz Piszczek.

However, Tuchel could not fault his players despite the loss in Portugal.

Benfica started the second half on the front foot and a run by Salvio resulted in a corner kick, taken by Pizzi, who found Luisao, playing his 500th match for the club. FRANCISCO LEONGFRANCISCO LEONG/AFP/Getty Images Benfica's Greek forward Konstantinos Mitroglou (L) celebrates with his teammate Benfica's Brazilian defender Luisao da Silva (R) after scoring during the UEFA Champions League round of 16 first leg football match SL Benfica vs Borussia Dortmund at the Luz stadium in Lisbon on February 14, 2017.

Aubameyang also missed two other great opportunities with shots from inside the area, one in each half, and Ousmane Dembele almost scored in the first half when his close-range shot was blocked in front of the goal.

Aubameyang nearly drew Dortmund level in the 53rd and then had a penalty, awarded for a hand ball on the hour, saved by Benfica's Brazilian keeper.

"Jonas is in the squad but he's at the limit and will have his difficulties trying to make the game. If he recovers, he's in; if not, someone else plays", said Vitoria.

It was Benfica's only attempt on target the entire match.

"I say unfortunately because even though he's got that graft the team are lacking, he also has a red card in him".

Despite the scoreline, Tuchel could not fault his players for their efforts on the night, and feels the tie is not over just yet.

"We were simply a long way below our limit and we have to admit Darmstadt deserved to win", he said. "If he scores a goal, that would be the cherry on top of the cake".

When is the second leg?