Jerome Boateng SLAPS team-mate Leon Goretzka in the face during training

Bayern Munich became the centre of controversy on Wednesday after photos on social media emerged of Jerome Boateng slapping Leon Goretzka in the face during training.

The 2014 World Cup winner became incensed after Goretzka mistimed a challenge during a small-sided game, which led to Boateng swinging out at his team-mate.

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