Robert Lewandowski scored twice after Pierre-Emerick had netted their opener against Mainz.
Check in to Borussia Dortmund vs Bayer Leverkusen
Mainz 1 – 3 Borussia Dortmund Extended Highlights by IsaacPeter
Liverpool’s worst signings ever: The top 10 terrible Reds transfers, with Aquilani & Downing
The world’s 20 best young players, as judged by FIFA 14, with Chelsea and Arsenal stars
(Video) The top 10 Arsenal goals in the Wenger era including strikes from club legend Thierry Henry