Cologne - Two of world football's most tactically astute coaches will have been working around the clock preparing for Matchday 27's Klassiker, going into the finest of detail and ensuring no stone goes unturned in the pursuit of a perfect plan to thwart their opponents.

The protagonists on the field are important too, of course, as it is there where the game will ultimately be won and lost.

bundesliga.com has donned its own coaching hat and taken a look at three particular duels which promise to tip the balance of power one way or another when Dortmund host Bayern this weekend.

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