Pierre-Emerick Aubameyang ran wild in Bayern's half of the field, scoring a goal and setting up Henrikh Mkhitaryan for the opening goal and heading in another in the second half.
It was the second consecutive year Bayern surrendered the Supercup to Dortmund with a two-goal defeat. The Bavarian giants have yet to win a Supercup match in Signa Iduna Park.
Dortmund's attacking pressure came right off the bat, Manuel Neuer having to come up with several critical saves. Bayern eventually got caught on a break, Aubameyang splitting Jerome Boateng and Javi Martínez to lay a pass off to the trailing Mkhitaryan for the goal.
Bayern then were dealt a huge blow defensively as Martínez needed to leave in the 31' minute with an apparent left knee injury, which he sustained in a collision with Marcel Schmelzer. Several media outlets are suggesting a ligament tear, but no official word has come from the club. Dante came off the bench to replace him, his second appearance since his return from his offseason holiday.
Trying to rekindle some continuity in midfield, Pep Guardiola brought on Philipp Lahm and Mario Götze in the second half, but Bayern could still not jumpstart their attack in Dortmund's end of the field.
Aubameyang then put the game out of reach after the halftime break, heading in a cross from Lukasz Piszczek. He celebrated with his teammates in a spiderman mask.
Bayern have now dropped their last two matches after going unbeaten through their first five preseason games. They will have to return to Nord-Rhein Westphalia this weekend to take on Preußen Münster in the DFB-Pokal next weekend.
Borussia Dortmund (2-0) Bayern München
BVB: Mkhitaryan (23'), Aubameyang (62')
Cards: Højbjerg FCB (45'), Boateng FCB (73'), Lahm (82')
Dortmund XI (4-2-3-1): Langerak – Piszczek, Papastathopoulos, Ginter, Schmelzer (Durm 46') – Kirch (Bender 85'), Kehl, Hofmann, Mkhitaryan – Aubameyang (Ramos 63'), Immobile
Bayern XI (3-4-3): Neuer – Boateng, Martínez (Dante 31'), Alaba – Højbjerg (Götze 59'), Rode, Gaudino, Bernat – Shaqiri, Lewandowski, Müller (Lahm 46')
- Though the results have to be taken with a grain of salt, the new set up Guardiola deployed did not hold up well. Even with Bayern utilizing five defensive-minded players, Dortmund were able to find spaces to operate and got several chances. If it had not been for Manuel Neuer's stellar goalkeeping, the game could have really gotten out of hand.
- Although it might still be premature for his career, Boateng's disciplinary record must be addressed. Already facing a suspension for Bayern's opener against VfL Wolfsburg, the 25-year-old German picked up his third yellow card in as many appearances in a club shirt – the DFB Pokal Final, the MLS All-Star Game, and the DFL Supercup. He has collected a red card in each of the last two group stages of the Champions League, but is capable of sustaining a clean record for a long period of time. He is still coming of age as a center back, but that "coming-of-age" period is quickly running out.
- Giancula Gaudino has been stellar this preseason, but this was the first game the youngster was really exposed. He had several key turnovers in the midfield that aided Dortmund's continual pressure, although his pass percentage remained relatively high at 84 percent. The ultimate plan regarding his development is not yet clear, but good seasoning in the reserves would not be a bad thing.
- Even with the major losses of superstars, Borussia Dortmund is a young and dangerous team. With Ciro Immobile and Aubameyang leading the line, they will torment many of their opponents. They stormed the pitch against Bayern Wednesday, despite Marco Reus continuing his recovery. They have made deep runs in all three competitions the last two years, and they are well-equipped enough to do so again.