Bayer Leverkusen on Sunday pulled off an outstanding 5-2 win at Bundesliga title contenders Borussia Dortmund, who now trail leaders Bayern Munich by nine points. Things didn’t start well for the hosts after Dan-Azel Zagadou had a sloppy pass cut by Patrik Schick. His shot was palmed by keeper Gregor Kobel, but the ball hit Dortmun defender Manuel Akanji, who scored an own-goal. The visitors soon returned the favour when Julian Brandt’s corner flicked off two Leverkusen players on the way and the goal was given to Leverkusen’s Jeremie Frimpong. But the Werkself was on fire and took back the le…