Novak Djokovic appoints Boris Becker as head coach

World number two Novak Djokovic has appointed six-time Grand Slam winner Boris Becker as his head coach. The 26-year old Serb, who has also won six major titles, will start work with Becker before the Australian Open, which starts on 13 January. via Pocket http://www.bbc.co.uk/sport/0/tennis/25429597