There was only 1 word in the Union tweet.

You have probably heard about the history of Isco and the Berlin Union. The German club wanted to sign the Spaniard, who recently became a free agent, but the deal fell through at the last minute.

Another Bundesliga club, RB Leipzig, decided to troll Union and flew into their official Twitter with the question, "Isco"?

And it would be better if they did not do this because they immediately ran into the answer: "Traditions?"

The Berliners' tweet went viral, garnering 40,000 likes.

In Germany, it is customary to make fun of Leipzig - opponents' fans remember to remind that the club has no history, titles, or traditions, and all the team's successes are associated with Red Bull's money.

This is not surprising - Leipzig was founded only in 2009.