Sébastien Haller suffered a shock just before the start of the season when he was diagnosed with testicular cancer. The striker then had to endure chemotherapy treatment. However, the player is now on the mend and could soon be fit enough to play again. He is currently keeping fit at the training ground of his former club.

Borussia Dortmund is eagerly awaiting the return of star new signing Sébastien Haller. He recently worked hard for his comeback - and of all things at his ex-club Ajax Amsterdam. "He asked us if he could come and train because he's in rehab here," said Ajax coach Alfred Schreuder on Tuesday. However, Haller does not train with his ex-colleagues on the pitch, but individually on a side pitch. Schreuder finds it "wonderful that he can be here for a while".

Although Haller was recently optimistic that he would soon be able to return to BVB team training, his return is still completely open. Finally, according to the attacker, it is also in the room that he has to undergo a second operation. Let's hope that the striker's ordeal will soon be over.

This article was originally published on 90min.com as In Amsterdam: Haller slaves away for possible comeback.