Description:Britain's world number three Andy Murray lost 6-3 6-4 to Janko Tipsarevic at the Mubadal World Tennis Championship in Abu Dhabi on Thursday (December 27). The US Open champion made a faltering start to the new season in the six-man exhibition event, making numerous unforced errors on his way to defeat at the hands of Serbian world number nine Tipsarevic, who goes on to face Spain's Nico Almagro, a late replacement for the ill Rafael Nadal, in the semi-final.(1:59)