LONDON — In a game fit to show to the world, Bayern Munich came from a goal down to roll over Borussia Dortmund, 2-1, on Saturday. This was Germany’s Der Klassiker being broadcast to 208 of FIFA’s 209 nations one week after Real Madrid and Barcelona had engaged a similar audience.

The one country not tuned in? North Korea.

A pity, because Koreans on both sides of their divide follow every nuance of the sport. It would not be lost on them that while the combined powers of Bayern and Borussia brought home the World Cup this year, there is intense rivalry and an internecine bitterness at the core of these annual encounters between Munich and the Ruhr.

What specifically rankles is that Bayern stalks, and either buys or gets for free, Borussia’s best players. One by one this plunder has gone on since Dortmund had the effrontery to finish ahead of Munich in the Bundesliga in successive seasons three years ago. Since then, the southern club has paid the release clause to get Mario Götze from Dortmund two seasons ago. It waited for the contract of Robert Lewandowski to run down before signing him without paying a price this summer.

And in the weeks and days leading up to Der Klassiker, the Bayern chief executive, Karl-Heinze Rummenigge, went public on the details he knows would allow his team to procure Dortmund’s current star, Marco Reus, when it chooses to do so.