Bayern Munich midfielder Leon Goretzka has sought to diffuse the situation after reports of a training-ground bust-up with team-mate Jerome Boateng.
As reported by Bild, defender Boateng allegedly punched Goretzka in the face in retaliation to a bad tackle in a training game.
While an official statement has not yet been released by the Bundesliga champions, photos from the training ground appeared to confirm the report.
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It was also reported that Goretzka had earlier come in for a telling-off from fellow team-mate Thomas Muller after complaining about a penalty decision which went against him.