Dortmund's 18-year-old Karetsas collapses on field on UCL debut

Borussia Dortmund's Konstantinos Karetsas slumped to turf 25 minutes into his UEFA Champions League (UCL) debut for Borussia Dortmund against Villarreal. The 18-year-old passed ball to teammate before signalling distress to referee. After treatment on pitch, he was taken off on a stretcher. The club stated that Karetsas faced circulatory problems and he was taken to hospital for further tests.