Yeb , Heidenheim isnt that bad and always good for some surprises results against other teams.
For sure Dortmund has the favorite Role in this game but we know that how the things can be go with that.
Normaly BVB should be win it today and thats why placed my bet there , if they lose that would be very disappointed.
Dortmund should win this one easily, Heidenheim is a very small team but they had a good run lately. They have 6 games unbeaten streak, that have to end some time and it could be today. Dortmund won their last 3 games with high scores, they have no problem about scoring. They only conceded one goal in these three matches so they don't have any problem in defense as well. All signs show that Dortmund should win the game, odds also reflect that. They need to be closer to Leverkusen and Bayern as the point gap is too much now.