#2 2013 Champions League: Dortmund 1-2 Bayern
Having established Dortmund as powerhouses in Germany, Klopp turned his attention to continental glory for the 2012-13 season. The Champions League campaign saw Der BVB top a group comprising of Real Madrid and Manchester City and underline their title credentials with a 4-1 destruction of Real in the semi-final first leg at Signal Iduna Park.
After weathering the Madrid storm in the second leg, Dortmund set up the final with bitter rivals Bayern. Jupp Heynckes had cultivated a 'never again' mentality among his Bayern players and despite a close match, Klopp found himself on the wrong end of a 2-1 scoreline with Arjen Robben slotting home the winner for Bayern with a minute of regular time remaining.
That season would be a defining one as Bayern took back their status as the premier German team, with Heynckes' side beating Dortmund in the DFL Super Cup and DFB Pokal in addition to winning the Bundesliga a whopping 25 points ahead of Klopp's side en route to a phenomenal 'Quadruple'.