Becker: Zverev "is trapped in a dark room somewhere"

Alexander Zverev needs a wake-up call after his terrifying appearances at the ATP Cup in Brisbane, according to Boris Becker. "He is trapped somewhere in a dark room and is looking for the light switch. But he has to be ready to want to look for him," said the team captain of the German team of the Frankfurter Allgemeine Zeitung (FAZ).