Sebastien Haller, 28, will be unable to play for Borussia Dortmund for several months. The histological examination revealed a malignant testicular tumour.

Haller will therefore have to undergo chemotherapeutic treatment.

"Sebastien will now receive the best possible treatment. The chances of recovery are very good. We wish him and his family a lot of strength and optimism and our thoughts are with him during this difficult time," said BVB sporting director Sebastian Kehl.

We ask the media and fans for their understanding for the fact that we will not disclose any medical details concerning Sebastien Haller's treatment beyond the above-mentioned information, neither today nor in the months to come.