World men's tennis number one Novak Djokovic will take on number 4 Andy Murray for the ATP Cincinnati Masters title.
Murray held off top American Mardy Fish in 2 tough sets, but Djokovic had just taken his opening set against Tomas Berdych 7-5 when the eighth-seeded Czech retired with a right shoulder injury.
Berdych had said he wasn't at full strength after his quarter-final upset of two-time defending champion Roger Federer.
Djokovic claimed his 57th victory of the season, with just one defeat.
Tomorrow he'll be gunning for his 10th title of 2011 and a sixth prestigious Masters title.
Murray, meanwhile, will be seeking just his second title of the season, after his triumph on the grass courts of Queen's Club in June.
