Image source, Joe McNally/BBCImage caption, Zaher is one of millions of children whose lives have been devastated by Sudan's civil war. In a dark room in Cairo, a 13-year-old boy looks up at a television screen, barely blinking. The screen flickers and Real Madrid's superstar winger Vinícius Júnior appears addressing the young boy directly, in Arabic: "Zaher, mahaba" - Hello Zaher.