With the score 0-0 from the first leg, Dortmund went 1-0 down and then 2-1 behind at home.
But two goals in injury time, from Marco Reus and Felipe Santana, secured a dramatic and famous win that puts them in the last four.
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The start of the 2017-18 Premier League season is just around the corner and is shaping up to be one of the most competitive yet.
As always it is the so called “big clubs” that have splashed the most cash in the transfer window so far this summer. Manchester United or City? Arsenal or Tottenham? Who are the winners and losers of the transfer window so far?