Olympic Games and US Open champion Andy Murray saw his Mubadala World Tennis Championship campaign last just 84 minutes on Thursday when he slumped to a 6-3, 6-4 defeat to Serbia\'s Janko Tipsarevic. Tipsarevic, the world number nine, will now face Spain\'s Nicolas Almagro, who replaced Rafael Nadal in the three-day exhibition tournament, in Friday\'s semi-finals. \"I hit the ball pretty well, it was just the execution of some of my shots wasn\'t perfect, but that\'s pretty normal when you have not played a match for a while,\" said world number three Murray. Tipsarevic added: \"I am happy with my game. I know it is an exhibition game but to play a Grand Slam champion and an Olympic Games gold medal winner and win, I am just delighted. \"I hope to get two more victories and that would be great going into the Australian Open.\" David Ferrer also reached the semi-finals with a 6-2, 6-4 win over Tomas Berdych of the Czech Republic. Ferrer will tackle world number one Novak Djokovic on Friday for a place in Saturday\'s final.