A blast from the past, Karim Adeyemi and more: Three things we learned from Borussia Dortmund’s win over Heidenheim

Nuri Şahin Borussia Dortmund overcome Heidenheim with a convincing 4-2 victory at the start of the third matchdayand thereby sent a signal to the top of the Bundesliga. After taking an early 2-0 lead, Dortmund threatened to undo their hard…