Dortmund vs Leverkusen: title contenders collide

Cologne - Bundesliga leaders Borussia Dortmund face conceivably the sternest test yet of their title credentials when they host Bayer 04 Leverkusen on Matchday 5. To get you in the mood for Sunday's showdown, bundesliga.com takes a closer look at how the two top-flight giants shape up both on and off the pitch...