'Disrespectful' fans cheered Novak Djokovic's mistakes during an ATP Finals match in which he was dumped out the tournament by Roger Federer

3:29am PST - November 15th, 2019    roger federer - Business Insider

Novak Djokovic had his mistakes cheered by "disrespectful" fans during his defeat to Roger Federer at the ATP Finals in London on Thursday. The Serbian had his three double faults clapped by a portion of the crowd, and also had other errors cheered in the 6-4…