Key sections in the article:
What are the key tasks of a defensive midfielder in the 3-4-1-2 formation?
How does the role of a defensive midfielder differ in the 3-4-1-2 formation compared to other formations?
What are effective training methods for defensive midfielders in the 3-4-1-2 formation?
What statistical metrics highlight the importance of defensive midfielders in the 3-4-1-2 formation?
