I V. WORLD CHAMPIONSHIPS 6)  Any player who withdraws from any round robin match after the first round shall  not be eligible for the single elimination competition. 1) The winner of each group shall be placed in separate semi-final brackets. The  runner-up of each group shall be placed in the semi-final bracket with the winner  of the opposite group. 3)  There shall be no playoff for the third and fourth place positions. 1) Selection List.  The selection list for the event shall be: 4) Alternate(s). a)  On the Monday following the last ATP Tour tournament of the year, the next  highest positioned team shall be asked to confirm its status as the alternate  team. Alternate team(s) may be selected by ATP to fill the draw upon terms  satisfactory to ATP. Any withdrawal after the official pre-tournament media  conference through the start of the last scheduled round robin match shall be  filled with the alternate team(s). The alternate team must appear at the official  pre-tournament media conference and remain available through the start of  the last scheduled round robin match. b) Additional alternate teams may be selected by ATP to fill the draw, based on  the selection list, upon terms satisfactory to ATP. Participation of such addi - tional alternate teams is not mandatory. c)  The alternate team(s) is eligible to play in the single elimination competition  and to receive points and prize money if they qualify. d)  If the alternate team(s) does not play in the draw, then a fee shall be paid to  the alternate team(s). If the alternate team(s) is inserted for the second or  third round robin match, then they shall receive the alternate fee plus any  prize money and points won. If the alternate team(s) replaces a team that  does not compete in their first round robin match, the alternate team(s) be - comes a direct acceptance and does not receive the alternate fee. 1)  The field shall be divided into two (2) groups of four (4) teams each. The  top-seeded team shall be placed in Group “A” and the second-seeded team shall  be placed in Group “B”. Teams seeded three and four, five and six, and seven  and eight, shall then be drawn in pairs with the first drawn placed into Group “A”.  2)  Each team shall play every other team in their group to determine the top two (2)  teams in each group. 3) The final standings of each group shall be determined by the first of the following  methods that apply: c)  Head-to-head results if only two (2) teams are tied. a)  Greatest number of wins. b)  Greatest number of matches played. Comment : 2-1 won-loss record beats a 2-0 won-loss record; a 1-2 record  beats a 1-0 record. i) If three (3) teams each have one (1) win, a team having played less than  all three (3) matches is automatically eliminated and the team advancing  to the single elimination competition is the winner of the match-up of the  two (2) teams tied with 1-2 records; or  ii)  Highest percentage of sets won; (Winning the MTB counts as one (1) set  won); or iii)  Highest percentage of games won. (Winning the MTB counts as one (1)  game won); a team completing less than all three (3) matches is automat - ically eliminated and the team advancing to the single elimination com petition is the winner of the match-up of the two (2) remaining teams; or  iv)  The team positions on the 2021 FedEx ATP Doubles Team Rankings as  of the Monday after the last ATP Tour tournament of the calendar year. 55 54 E. Single Elimination Competition 2)  The event shall be completed with a single elimination competition for the semi-fi - nals and final. F. Prize Money and Points  Final standings at the end of the tournament shall determine the prize money and FedEx ATP Rankings points earned. 4.02 Nitto ATP Finals - Doubles  A.Competition Format  The tournament shall be a doubles round robin format with eight (8) teams. There  shall be two (2) groups of four (4) teams each with eight (8) seeds to be determined  by the 2021 FedEx ATP Doubles Team Rankings on the Monday after the last ATP  Tour tournament of the calendar year. All matches shall be two (2) tie-break sets with  a deciding Match Tie-break (10 point) at one (1) set all. The round robin shall deter - mine the four (4) teams for the semi-finals with the format thereafter being a single  elimination competition. a)  The top 7 teams in the 2021 FedEx ATP Doubles Team Rankings as of the  Monday after the last ATP Tour tournament of the calendar year; followed by  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 2021 FedEx ATP Doubles  Team Rankings as of that Monday; followed by c)  Teams positioned eight (8) and below in the 2021 FedEx ATP Doubles Team  Rankings as of that Monday. 2) Direct Acceptances.  The top eight (8) teams in the selection list shall qualify  for the event as direct acceptances. Participation is mandatory, and all qualified  teams 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. 3) Withdrawal.  All eligible teams shall be entered by ATP; however, teams may  withdraw through the Monday following the last ATP Tour tournament of the year.  Any withdrawal, before the official pre-tournament media conference starts, shall  be replaced by the next highest positioned team on the selection list, who shall be  qualified as a direct acceptance. I V. WORLD CHAMPIONSHIPS C.Order of Play B.Entries Round Robin