Two derbies, two shocks in the Bundesliga on Saturday. Augsburg stunned defending champion Bayern Munich in their Bavarian derby 1-0, and Borussia Dortmund’s 1-0 Ruhr derby win over Schalke was overshadowed by a serious-looking injury to captain Marco Reus. Brazilian defender Iago deflected the ball from a free kick into Berisha’s path and the Augsburg forward let fly to beat …