Koja tri ima gulbis? Ima dva osvojena ove sezone.

Ja ovo citam, da igrac u top 30 mora igrati 4 od 500 od tih 6 turnira:

A player's ATP Ranking is based on the total points he accrued in the following 19 tournaments (18 if he did not qualify for the ATP World Tour Finals):

The four Grand Slam tournaments
The eight mandatory ATP World Tour Masters 1000 tournaments,[2]
The previous ATP World Tour Finals count until the Monday following the final regular-season ATP event of the following year.[3]
The best six results from all ATP World Tour 500, ATP World Tour 250, ATP Challenger Tour, Futures Series, Olympics and Davis Cup tournaments played in the calendar year[4]
The requirement to play in four ATP World Tour 500 events does not apply to a player who was outside the top 30 in the previous year-end ranking; however, no more than four of his results from 500 level events may be counted.[1] For a better result within the same tour type to be transposed one has to wait for the expiry of the first worse result from previous year. It only expires at the drop date of that tournament and only if the player reached a worse result or hasn't entered the current year.