ATP Finals: Djokovic needs a win as Nadal squeezes into the semis
ADVERTISEMENTThe World Number 1, Novak Djokovic, cannot afford any errors when he faces off against Alexander Zverev on Friday at the O2 Arena as he bids to add the Nitto ATP Finals to his list of 2020 conquests. Djokovic has a 3-2…