Haller thanks the medical staff of Borussia Dortmund, the club that took him over from Ajax this summer for up to 34.5 million euros, as well as the hospital staff who treated him ‘exceptionally’.
Haller was not feeling well after training in Switzerland last Monday. Borussia Dortmund initially reported that the attacker was ill. Examination at a hospital showed that he has a tumor near a testicle.