Sebastien Haller says he has completed the first step of his treatment after being diagnosed with a testicular tumour.
Borussia Dortmund's former West Ham forward complained about feeling unwell following training on Monday and immediate medical examinations detected the tumour.
Posting a picture from his hospital bed on Thursday, a smiling Haller tweeted: 'Hello everyone, I wanted to let you know that Step 1 has been completed!
'I would like to thank the @BVB (Dortmund) and the medical team who were exceptional with me.