Former world number one Tennis player and 12-time major winner Novak Djokovic will face Spain's RobertoBautista Agut in his first match in almost six months at theMubadala world championships in Abu Dhabi tomorrow. Bautista Agut, the world number 20, set up theshowdown against Djokovic by seeing off flamboyant youngRussian Andrey Rublev 7-5, 6-2. Djokovic hasn't played since retiring from his quarter-final at Wimbledon against Tomas Berdych in July with an elbowinjury. The 30-year-old will make his comeback today beforelaunching his competitive campaign as top seed at the QatarOpen next week. South African world number 14 Kevin Anderson provided thefirst upset of the three-day Abu Dhabi event, defeating the10th ranked Spaniard Pablo Carreno Busta in the opening match. Another highlight of the tournament will be the comeback of former women's number one Serena Williams on Saturday.