Serie A champion turns MMA fighter after retiring from football

On 23 September, former Germany international midfielder Diego Demme announced his retirement from professional football, ending a 16‑year career that saw him rise from the German lower leagues to win the Serie A title with Napoli before turning to mixed‑martial‑arts competition.

"I retired because of the two head injuries I had in the last two years, that was a difficult time for me, and that’s why I decided to finish my career," Demme told. He added that he wanted to stop while still healthy and not risk further injury on the field.

From German lower leagues to Serie A glory

For 16 years, football was Diego Demme's way of life. It took him from the lower leagues of German football to the heights of the Bundesliga and Serie A, where he helped RB Leipzig establish themselves among Europe’s elite. He also contributed to Napoli ending a 33‑year wait for the Scudetto. After developing at Arminia Bielefeld and Paderborn, Demme helped Leipzig achieve two promotions, reach the 2019 DFB‑Pokal Final and become Champions League regulars before swapping the Bundesliga leaders for a Napoli side in crisis.

Injuries, retirement and life after football

After suffering two serious head injuries in four months, Demme faced a difficult choice between continuing his career and protecting his health and family. After four and a half years in Italy, he returned to Germany in 2024, initially taking on the captaincy at Hertha Berlin. On 15 September 2024, Demme took a knee to the chin during Hertha's 2–0 defeat to Fortuna Düsseldorf.

Diego Demme swaps Serie A glory for Berlin pizzerias

Although he initially continued playing, he later experienced headaches, dizziness and problems with his right eye. Four months later, a training ball struck him in the temple, causing him to lose consciousness. The lingering effects saw him miss 27 matches across his final two seasons.

"It was a difficult situation. I felt very bad due to the concussions, and that was the first time I felt, ‘What the f**k is going on?' I couldn’t drive the car. I have a wife and family, and the most important thing was to be there for them, so I felt it was better to stop football," Demme explained. Despite interest from Italian clubs including Empoli, Cesena, Catania and Sorrento, he decided against extending his playing career.

The 34‑year‑old now runs two Neapolitan pizzerias in Berlin, oversees the construction of his house in Kleinmachnow and pursues qualifications in padel coaching and sports massage. He also enjoys more time with his daughters, six‑year‑old Gia and three‑year‑old Ellie.

Demme has not abandoned competitive sport, training in boxing, grappling and mixed martial arts while returning to football with Plyrs United in the Icon League, the indoor small‑sided competition founded by Toni Kroos and Elias Nerlich. "I didn’t want to join another club where I’d move because my eldest daughter started school this summer, so I decided to stop. But now I feel good again, and I feel like the old Diego before my injuries. I will play the Icon League because the physical risk isn’t as much as a regular Bundesliga match," he said. From chasing the Coppa Italia and the Scudetto, Demme now values the chance to grow old in good health and watch his daughters grow up.