This season, Borussia shows very unstable results in the championship of Germany, alternating beautiful victories with deafening defeats.
According to the Director of Dortmund Hans-Joachim Wattske - the main problem of the team is the mentality.
"Borussia 2011-2012, which became the champion of Germany, in the game plan was weaker than the current one," said Wattske.
"Nevertheless, she had an incredible character, which is difficult even imagine.
The current team most lacks such moral qualities ".
"We have to work on this and solve the existing problems with the mentality".
"Also we will replenish the composition, depending on how the second half of the season will pass," - concluded Hans-Joachim.
In the 21st round of the Bundesliga, Dortmunds defeated Cologne 3: 2 on the road.
At the moment, Borussia is 4th in the Bundesliga standings, but from the second line it is only 1 point.