bundesliga.com rounds up the protagonists' thoughts on the Matchday 15 thriller...
Bayer 04 Leverkusen
Heung Min Son: This was possibly our best display so far this season. Getting the better of Dortmund is difficult enough, and for me to score the decisive goal is of course fantastic. We've shown many times we can keep up with strong sides, and Dortmund without a doubt are one of them. I had a good feeling going into the game, and I'm glad we did so well. We should now enjoy our success and then make sure we're again at our best on Tuesday [in the UEFA Champions League against Real Sociedad de Futbol].
Stefan Kießling: The win isn't so much about keeping track with [Bundesliga leaders] Bayern München. We want to play good football and gather as many points as possible. And we're certainly doing very well in that respect at the moment.
Kevin Großkreutz: We started off well, but failed to keep it up. Leverkusen were better in the tackle, they looked sharper and deserved to win. We should have reacted better to going down, but instead stopped playing football. We have to make sure we quickly forget about the defeat and get ready to beat Marseille.
Roman Weidenfeller: We weren't at our best today. We now have a must-win situation in the Champions League [away to Olympique de Marseille], and then have to make sure we get back on track in the Bundesliga.