The Tournament was supposed to be played in March at the start of the US hard court matches was cancelled and then changed to be played from 7 to 17 October 2021.
For the first time in many years neither of Djokovic, Nadal or Federer will play in the upcoming series and it sems like either Medevev or Zverev would be the favourites to win.
One will have to see what comes up as to th e seedings. Of the Top 10 ranked players all three mentioned are missing from the tournament - while Rublev and Ruud are in the semi in the San Diego tournment - the semi's being today and the final tommorrow, The result of this tournment will have no impact on the actual rankings - but would nevertheless be interesting.
One would feel that the top 6 seedings will be as follows:-
I will post the seedings iro the seeded players when it becomes available.