Dortmund coach Thomas Tuchel was philosophical after a hard tie from the moment his team's bus was attacked before the first leg last week.
Meanwhile, Dortmund bow out after a tie overshadowed by the bomb attack on the team's bus last week that forced the first leg to be postponed by a day.
Wednesday's second leg takes place at Monaco's Stade Louis II, with the Ligue 1 club aiming to reach a first Champions League semifinal since 2004, when they went on to lose in the final to Porto. "The police was there to escort us and we asked them why we couldn't move and they just said 'for safety reasons.' You can imagine that eight days after the attack that (this is) the worst thing that can happen".
"I had the feeling we were focused and full of joy and happiness to play this game".
Dortmund coach Tuchel had few complaints, telling reporters: "We started well with one or two unsafe moves where we found some space and then conceded an unlucky goal. My goal is to aim the younger players in the team, help them if they want to talk about it and if I can offer them some support", said Reus, who scored last weekend in a 3-1 home win against Eintracht Frankfurt. We know what we need to do.
Monaco then doubled their lead on 17 minutes following a flowing break when Thomas Lemar curled the ball into the Dortmund box from the left and Falcao dispatched a diving header into the bottom right corner.
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A win on Sunday will see Madrid move six points clear at the top of the table, with a game in hand over Barcelona. You can also follow it with our LIVE scores, results and stats. "I don't know if there's a category for him.
AS Monaco manager Leonardo Jardim says his side are not going to shy away from their attacking style during the Champions League semi-finals.
The Ruhr side are trailing 2-3 from their first leg match.
The 18-year-old was a lively presence throughout as goals from fellow strikers Radamel Falcao and Valere Germain saw Monaco through to the semi-finals - where they could face Real Madrid, Juventus or Atletico Madrid - but Mbappe is unconcerned about the prospects of Friday's draw.
The hosts poured forward with ruthless efficiency in the first half, with the pace of Benjamin Mendy and Thomas Lemar creating an overlap on Monaco's left that Dortmund had no answer to.
The visitors suffered a blow after 30 minutes when Erik Durm picked up a knock, although he was replaced by Ousmane Dembele, who scored in the first leg.
Falcao lofted a shot narrowly over after breaking down the right in the 65th and Mbappe had a low shot saved moments later from a similar position.