Germany's preparations ahead of their Euro 2024 opener against Scotland took an unwanted turn during a public training session on Monday.
It is being reported that a 'heated' altercation took place between Antonio Rudiger and Niclas Fullkrug as 4,000 fans watched on.
German publication BILD suggest Real Madrid defender Rudiger repeatedly pulled Fullkrug down during one particular training drill.
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And after a 'tough' tackle resulted in Fullkrug hitting the deck, the Borussia Dortmund forward 'cursed' at his Germany teammate.
In fact, the report claims Fullkrug headed straight towards Rudiger and they both pushed each other, 'almost' coming to blows as a result.
Germany assistant coach Sandro Wagner is believed to have stepped in to separate the pair.
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A drinks break was called shortly after the scuffle, and according to BILD, both Rudiger and Fullkrug were still upset by the incident.
Wagner, to his credit, went over to try and calm Rudiger down as a furious Fullkrug 'stomped' past the Germany centre-back.
Rudiger, meanwhile, failed to return to the team session and instead went for a run with the fitness trainer to 'probably' cool down from the unsavoury events.
The incident comes just days before the opening match of Euro 2024, when hosts Germany take on Scotland at the Allianz Arena.
Funnily enough, it is also suggested that Fullkrug and Rudiger are very good friends.
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In fact, on Monday, Fullkrug named his German teammate as one of the players he gets on with most within the 26-man squad.
Both players also featured in the Champions League final on June 1 as Real Madrid secured their 15th European Cup with a 2-0 win over Borussia Dortmund.
Ahead of the game, Fullkrug opened up on his friendship with Rudiger.
"He's a good boy, I love him. I like him because he's very honest, even if he's aggressive," the 31-year-old said.
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"In training he's the same: he's a natural leader. He comes towards you and it seems like he wants to kill you (laughs). But I'm like that too and I love playing against this type of opponent."
Jack Kenmare