London: Novak Djokovic has warned Kei Nishikori there will be no repeat of his shock US Open loss to the Japanese star when they meet in the ATP Tour Finals on Saturday. (Wawrinka sets up all-Swiss semis vs Federer)
Djokovic booked a semifinal showdown with Nishikori after finishing top of Group A thanks to a 6-2, 6-2 rout of Tomas Berdych at London's O2 Arena on Friday. (Road to recovery still ahead for Andy Murray)
The victory also guaranteed the Serb would finish top of the year-end world rankings for the third time in four years.