Borussia Dortmund striker Sebastien Haller is diagnosed with testicular cancer after feeling 'unwell' during training.

 Borussia Dortmund striker Sebastien Haller is diagnosed with testicular cancer after feeling 'unwell' during training.

Borussia Dortmund h
ave confirmed that striker Sebastien Haller has been diagnosed with testicular cancer after falling 'unwell' in training on Monday.

The Ivorian only arrived at the Bundesliga club earlier this month after completing his move from Ajax for £31m.

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