Borussia Dortmund striker Sebastien Haller to undergo chemotherapy

The former West Ham forward is expected to be out of action for several months.

RECOVERY: Former West Ham forward Sebastien Haller who has thanked his well-wishers after being diagnosed with a testicular tumour.

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.