Borussia Dortmund have confirmed striker Sebastien Haller is to undergo chemotherapy after examinations revealed a testicular tumour to be malignant.
The former West Ham forward is now expected to be out of action for several months. The tumour was diagnosed earlier this month after Haller complained of feeling unwell after training.
Dortmund sporting director Sebastian Kehl told the club’s website: "Sebastien will now receive the best possible treatment. The chances of recovery are very good.
