There appears to be no stopping Novak Djokovic in Beijing as the world No 1 needed just 53 minutes to continue his unbeaten record at the China Open on Thursday. Djokovic picked up his 26th career win at the ATP 500 tournament as he beat Chinese No 1 Ze Zhang 6-2, 6-1 to progress to the quarter-finals. The Beijing dominance of five-time champion Djokovic is further highlighted by the fact he has only ever dropped three sets and has never been extended to longer than two hours in a match here.