Djokovic beats Zverev to reach last four at ATP Finals

Novak Djokovic out-battled Alexander Zverev to qualify for the last four at the ATP Finals on Friday, staying on track to match Roger Federer's record of six titles at the end-of-season event. The Serbian top seed, who was beaten comprehensively by Daniil Medvedev in his second round-robin match, was again below his best in...