Five things we’ve learned in the Bundesliga this season

It has been an exhilarating start to the Bundesliga season, with Dortmund leading the way, Bayern hot on their heels, and BVB’s Revierderby rivals Schalke looking like they more than belong back in the top flight.
Some 137 goals have been poured in over the first four matchdays, meanwhile, with Bayern’s 14 the most of any team. Bundesliga takes a look at five talking points from the season so far…