Bild: Kerber adjusted many trainings to improve his performance, and he honed his resilience while coaching Shaheen

Dortmund will play a Champions League match against Manchester City away from home on Wednesday night. Team goalkeeper Kerber will be their best hope for victory. The German media "Bild" wrote an article analyzing the five secrets of the goalkeeper's continuous improvement in the past few years.

For Dortmund, they faced Manchester City with a record-setting defense line: after 9 rounds of Bundesliga games, they had 6 clean sheets, which had never happened before. But in terms of the content of the game, Dortmund's recent performance has not been convincing. And: The Yellow and Black Legion will face Haaland, who has created a frightening statistic of scoring 17 goals in 13 official games.

However, "Bild" also said that fortunately Dortmund still has Kerber. This goalkeeper is currently in the best condition of his career, and the top forwards from Manchester City should also be prepared to face him. "Bild" revealed how Kerber has become stronger and stronger in recent years:

► Kerber has parsed himself down to the tiniest details: In recent times, he has made the greatest progress in his foot skills, and he is now more adept at making lob passes to the left and right sides, as well as low passes to the center. His control of the penalty area has also been further optimized through special training, the focus of which is set by himself, and the specific training content is carefully communicated and confirmed with goalkeeper coach Matthias Kleinsteiber.

► As early as the youth team of Hoffenheim, Kerber was trained to use a very wide stance, but he has now adjusted this stance, and the distance has been reduced by about 5 centimeters. With a more compact foot position, Kerber should be more flexible and easier to take the first small step to complete the save, which will also help his save action to accumulate more power.

► A special camera that films Kerber during training is used to evaluate his body's static posture. The focus is on ensuring that the legs and upper body are in a straight line to prevent excessive extension of the knee joints and other parts, which can enhance the strength of his movements.

► In the past few years, Kerber has often been sidelined due to injuries, and he has adjusted his training plan accordingly. The secret is: less is more. The goalkeeper now focuses more on specific training of certain muscle areas rather than just lifting weights on the training equipment, and he also strictly maintains his weight, which does not fluctuate by more than a kilogram.

► During the coaching period of former coach Shaheen, Kerber was required to continue to make short passes when releasing the ball. He used that slightly difficult phase of his career to build resilience. Under Kovac, Kerber has full freedom to decide what to do with the ball at his feet.

In addition, Kerber welcomed his first child at the end of the summer, and becoming a father for the first time further gave him confidence. Therefore, he also hopes to be a key player in the game again against Manchester City and Haaland.