Novak Djokovic defeated Kei Nishikori to reach the final at the World Tour Finals . Djokovic drops his first set of the tournament but prevails 6 - 1 3 - 6 6 - 0 in about 90 minutes . He will face Roger Federer in the final after Federer topped fellow qualifier Stan Smith . Federer saves four match points as he improves to 11 - 5 versus Wawrinka on hard courts .
Novak Djokovic defeats Kei Nishikori to reach the final at the World Tour Finals . Djokovic drops his first set of the week but prevails 6-1 3-6 6-0 in about 90 minutes . He will face Roger Federer in the final after Federer topped fellow Swiss Stan Wawrinka . Federer saves four match points as he improves to 11-0 versus Wawrinka on hard courts .