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Martin Meissner/Associated Press

In what was supposed to be a routine away win for German giants Borussia Dortmund, Thursday night's Europa League first leg against Odd Grenland turned into something of a fiasco.

After just 22 minutes in the Skagerak Arena, Norway Thomas Tuchel's side were three goals down and looked set to crash out of European competition through embarrassing circumstances.

Although Dortmund came back to claim the game as their own, with goals from Pierre-Emerick Aubameyang, Shinji Kagawa and Henrikh Mkhitaryan to make it 3-4 in the end, there were plenty of things to note over the course of the game.

Tuchel will have learned a lot about his side this week.