Super-Sub or Sidelined? The Tension Between Julian Nagelsmann and Deniz Undav

In the high-stakes environment of the German national team, the gap between club form and international standing can sometimes feel like a canyon. For Deniz Undav, that gap is currently defined by a specific, frustrating label: the “super-sub.”

Despite a prolific run of form with VfB Stuttgart, the 29-year-old striker finds himself at the center of a public tug-of-war with head coach Julian Nagelsmann. While Undav continues to deliver goals, Nagelsmann remains steadfast in his belief that the forward’s utility is maximized only in the closing stages of a match—a philosophy that has sparked a series of verbal exchanges between the player and his manager.

As the DFB (German Football Association) prepares for the World Cup, the friction between Nagelsmann’s rigid tactical roles and Undav’s desire for a starting spot has become a primary talking point for fans and analysts alike.

The tension reached a boiling point following Germany’s recent international break, specifically after a victory over Ghana on March 30, 2026, in Stuttgart. Undav, who began the match on the bench, was introduced at halftime. He remained largely anonymous for much of his appearance until the 88th minute, when he scored the decisive 2-1 goal to secure the win.

Deniz Undavs Jokerrolle war das dominierende Thema rund um die deutschen Länderspiele. Nun äußert sich der Stürmer zu seinem Verhältnis zu Julian Nagelsmann. Er habe noch einmal mit dem Bundestrainer gesprochen.

For many, a game-winning goal is the ultimate argument for a starting position. For Nagelsmann, still, it was a confirmation of his existing theory. In the post-match press conference, the coach downplayed Undav’s contribution, noting that the striker “barely touched the ball” and had “none at all” in terms of chances prior to the goal.

“He’s welcome to put me under pressure,” Nagelsmann remarked, referring to Undav’s selection. He credited Leroy Sané for the setup and argued that Undav was only able to capitalize given that he was “fresh” and the opponent was tired.

The Doctrine of ‘Defined Roles’

Nagelsmann’s refusal to promote Undav to a starter isn’t just about a single performance; This proves rooted in a strict adherence to what he calls “defined roles.” The coach has been open about his belief that Undav’s physical and tactical effectiveness fades when he is required to work hard for the full duration of a match.

Nagelsmann pointed to Germany’s 3-4 away win against Switzerland as a primary example, noting that the intensity required in the first 60 to 70 minutes is a standard that must be met for the World Cup. According to the coach, Undav’s qualities are most potent when he can enter a game late and exploit a fatigued defense.

This insistence on role-playing is, for Nagelsmann, a matter of professional integrity. “We have defined roles,” he explained. “And I must stick to them… Otherwise I can forget about my credibility. If I then do everything differently, there’s no point in having the discussion about roles in the first place.”

This approach has not been without controversy. Critics have pointed out that other players, such as Nick Woltemade, have played significant minutes—up to 70 in some instances—without providing the same clinical output as Undav. Yet, Nagelsmann maintains that the structural role of the player is more important than individual goal statistics in the short term.

A Pattern of Selection Friction

This is not the first time Nagelsmann has used “roles” to justify polarizing selection decisions. During the lead-up to the 2024 European Championship, he utilized similar reasoning to justify the omission of Leon Goretzka (who has since returned to the squad). He as well initially omitted Angelo Stiller based on his role, only to call him up and start him in matches against Switzerland and Ghana following an injury to Aleksandar Pavlovic.

For Undav, the situation is particularly jarring given his status at the club level. In the Bundesliga, he is a cornerstone of the Stuttgart attack, often viewed as the catalyst for their offensive success. The disconnect between being a “scoring sensation” for his club and a “permanent substitute” for his country has led to a public back-and-forth.

Reports indicate that the two have continued to “trade swipes,” with Undav responding directly to Nagelsmann’s comments in interviews. While there have been indications that the two have spoken to clear the air, the fundamental disagreement over Undav’s capacity to start remains unresolved.

World Cup Implications

As Germany moves toward the World Cup, the “Undav Dilemma” presents a tactical risk for Nagelsmann. Relying on a player as a “super-sub” is a viable strategy, but it limits the team’s options if the starting frontline struggles to break a deadlock early in a match.

The statistics generally support Nagelsmann’s claim that Undav is more effective in the closing stages of a game. However, the psychological toll of being publicly downplayed by one’s own manager can be unpredictable. The question remains whether Undav can continue to accept the “joker” role with grace, or if the friction will reach a breaking point before the tournament begins.

For the global football community, this clash represents a classic managerial struggle: the balance between trusting a player’s current form and adhering to a rigid tactical blueprint. Nagelsmann is betting his credibility on the latter.

The German national team has two remaining matches before the World Cup. These fixtures will serve as the final testing ground for Nagelsmann’s “defined roles” and will determine if Undav can finally force his way into the starting eleven or if he will remain the luxury substitute for the duration of the tournament.

Do you agree with Nagelsmann’s “defined roles” approach, or should a player in Undav’s form be guaranteed a start? Let us grasp in the comments below.