On the evening of August 21, local time, fans from both sides clashed during the first round of the German Cup between Mannheim and Kaiserslautern. The match was suspended for a while, and in the end, Kaiserslautern won 1-0 in overtime. According to a police report on August 22, a total of 85 people were injured in the clashes, 8 of whom were taken to medical treatment for further treatment; 35 police were injured, and many fans were temporarily detained. There were also incidents at the scene, such as setting off fireworks, firing fireworks into the stands, and fans storming into the venue. The police have launched an investigation into related suspected illegal acts.

On the evening of August 21, local time, fans from both sides clashed during the first round of the German Cup between Mannheim and Kaiserslautern. The match was suspended for a while, and in the end, Kaiserslautern won 1-0 in overtime. According to a police report on August 22, a total of 85 people were injured in the clashes, 8 of whom were taken to medical treatment for further treatment; 35 police were injured, and many fans were temporarily detained. There were also incidents at the scene, such as setting off fireworks, firing fireworks into the stands, and fans storming into the venue. The police have launched an investigation into related suspected illegal acts.