Five-time champion Novak Djokovic beat American Taylor Fritz 7-6(7-5), 7-6(8-6) in the semi-final of the ATP Finals in Turin on Saturday. "I didn't feel very reactive today or very comfortable...I am very pleased to have overcome this one," said Djokovic. The Serbian won his last Red Group match against Daniil Medvedev in three hours and 11 minutes on Friday.