The big gaps at the top of the rankings speak for themselves at the official end of the tennis season, which is not quite the real end of the tennis season, with the International Premier Tennis League relaunching in Japan on Wednesday.
Novak Djokovic has a record 16,585 points, putting him more than 7,000 ahead of No. 2-ranked Andy Murray.
Serena Williams has 9,945 points, nearly 4,000 more than No. 2-ranked Simona Halep, even though Williams skipped the final two months of the season.
It was a year of rare double dominance, with Djokovic and Williams each winning three of the four major singles titles and Williams coming within two matches of the first true Grand Slam since 1988.