World number ones Novak Djokovic and Serena Williams completed a clean sweep for tennis as they won the Laureus Sportsman and Sportswoman of the Year awards on Monday. In a glitzy ceremony in the German capital, hosted by U.S. actor Bill Murray, Serbia's Djokovic beat Barcelona footballer Lionel Messi, sprinter Usain Bolt and Formula 1 champion Lewis Hamilton among others for the top men's award at the annual ceremony. Djokovic and American Williams, who fought off competition from footballer Carli Lloyd and Jamaican sprinter Shelly-Ann Fraser-Pryce among others, were rewarded for dominating their sport last year, with each winning three of the four grand slams. More...