Last of ‘Big Four,’ Novak Djokovic battles on

SHANGHAI–Former world number one Novak Djokovic, the last surviving member of tennis’ “Big Four”, said he does not plan on stopping any time soon but admitted that the retirement of rivals Roger Federer, Andy Murray and Rafa Nadal has been overwhelming. Djokovic, Federer, Nadal and Murray were dubbed the “Big Four” during a period of