I V. WORLD CHAMPIONSHIPS III. FINANCIAL 51 50 d) If the alternate(s) does not play in the draw, then a fee shall be paid to the  alternate(s). If the alternate(s) is inserted for the second or third round rob - in match, then he shall receive the alternate fee plus any prize money and  points won. If the alternate(s) replaces a player that does not compete in his  c) The alternate(s) is eligible to play in the single elimination competition and to  receive points and prize money if he qualifies. b) Additional alternates may be selected by ATP to fill the draw, based on the  selection list, upon terms satisfactory to ATP. Participation of such additional  alternates is not mandatory. a)  The next highest positioned player on the selection list (who is not a direct  acceptance at the time of the official pre-tournament media conference) shall  be designated as the alternate and shall replace any player who subsequent - ly withdraws. The alternate must appear at the official pre-tournament media  conference and remain available through the start of the last scheduled round  robin match. 4) Alternate(s). 3) Withdrawal.  Any withdrawal, before the official pre-tournament media confer - ence starts, shall be replaced by the next highest positioned player on the selec tion list, who shall be qualified as a direct acceptance. 2) Direct Acceptances.  The top eight (8) players in the selection list shall qualify  for the event as direct acceptances. Participation is mandatory, and all qualified  players shall be entered. All direct acceptances must be at the tournament site  to attend the official pre-tournament media conference and must be available for  play through the completion of the round robin competition and the knock-out  competition if eligible. *The Race to Turin is a ranking using the same rules as the FedEx ATP Ranking  (Singles) but based exclusively on results from 2021 events only. c) Players positioned eight (8) and below in the FedEx ATP Race to Turin* as of  that Monday. b)  Up to two (2) Grand Slam winners of that year, in order of their positions,  positioned between eight (8) and twenty (20) in the FedEx ATP Race to Turin*  as of that Monday; followed by a) The top seven (7) players in the FedEx ATP Race to Turin* (based exclusively  on results from tournaments played in 2021) as of the Monday after the last  ATP Tour tournament of the calendar year; followed by  1) Selection List.  The selection list for the event shall be: B.Entries A.Competition Format  4.01 Nitto ATP Finals - Singles The tournament shall be a singles round robin format with eight (8) players. There  shall be two (2) groups of four (4) players each with eight (8) seeds to be determined  by the FedEx ATP Rankings on the Monday after the last ATP Tour tournament of the  calendar year. All matches shall be the best of three (3) tie-break sets, including the  final. The round robin shall determine the four (4) players for the semifinals with the  format thereafter being a single elimination competition.