Watch: Mbappe, Falcao lead Monaco vs. Dortmund in UCL quarterfinal decider

Monaco is back in the Champions League semifinals after ousting Dortmund in a 6-3 aggregate.

Monaco finished off an emotional series with Borussia Dortmund and advanced to the Champions League semifinals, beating Dortmund 3-1 on the day and 6-3 on aggregate, continuing its sensational run through the competition.

Kylian Mbappe's two goals and a Dortmund own goal gave Monaco three precious away tallies in the postponed first leg following the bus attack that rocked Dortmund last Tuesday. The 18-year-old star added to his tally in the third minute to set the tone on Wednesday. 

Mbappe followed up a parried shot by goalkeeper Roman Burki, after he had saved Benjamin Mendy's effort, making it 4-2 on aggregate to the Ligue 1 leader in just the third minute.

Kylian Mbappe is the 1st player to score in his first four #UCL knockout stage games. He is 18 years old. 😱 #ASMBVB https://t.co/ytqY3O2Jt6

— FOX Soccer (@FOXSoccer) April 19, 2017

Dortmund, with Marc Bartra–who was injured in the bus attack–on the bench as inspiration, nearly pulled one back through Nuri Sahin, but his 14th-minute free kick rattled the post, coming inches away from sneaking by Danijel Subasic.

What a free kick from Sahin as he hits the bar. Unlucky that it stays out! #bvb #ASMBVB #asm #ChampionsLeague pic.twitter.com/Hlp5wUXDfb

— GolazoJuice (@GolazoJuice) April 19, 2017

Things swung even more in Monaco's favor three minutes later, when Radamel Falcao capped a sensational build-up that ran the length of the field with a clinical header from the center of the box, extending the lead to 2-0 on the day, 5-2 on aggregate.

Falcao gets in on the scoring with his 5th #UCL goal this season! #ASMBVB https://t.co/LpOEbL8ljN

— FOX Soccer (@FOXSoccer) April 19, 2017

Ousmane Dembele made a difference off the bench for Dortmund and he was influential early in the second half with a sensational run to set up Marco Reus. The German finished off Dembele's cross in the 48th minute to pull Dortmund within 5-3.

Dembele with an excellent run and cross and Marco Reus finishes it off. Still work to do for #bvb #ASMBVB #asm #ChampionsLeague pic.twitter.com/I1dgXb5Bq4

— GolazoJuice (@GolazoJuice) April 19, 2017

American Christian Pulisic came on in the 72nd minute with Dortmund needing two to force extra time, but the comeback continued to stall out, and Monaco put it out of reach soon after. 

Valere Germain, with his first touch after coming on to replace Mbappe, scored in the 81st minute to restore the three-goal edge.

¡GOL de @AS_Monaco_ES! Germain había entrado segundos antes y su primer toque fue esta anotación @AIzquierdo10 @TroySantiagoTV pic.twitter.com/IWvdXF2NuB

— FOX Deportes (@FOXDeportes) April 19, 2017

In its only final appearance, Monaco last reached the Champions League title match in 2003-2004, falling to Jose Mourinho's Porto in Germany.

With Dortmund's ouster, it marks the first time since 2008-2009 that no German team has reached the semifinals and the first time since 2002-2003 that no German or English team has reached the final four.