The 64 participants will be divided into 16 groups of 4 participants, and will face each other in a 3-round system. Groups A1 to D1 will start the first day, Groups E1 to H1 the second day, Groups I1 to L1 the third day and groups M1 to P1 the fourth day, and Groups A1 to D1 will return to the fifth day following said succession. The best two of each group will qualify to the second phase.
This phase will begin after the Final Division starts at FCT18. So the days when a new round starts at FCT18, will be skipped in CGT18, in what remains of FCT18 tournament.
In the second phase the 32 classified from the previous phase will participate, and here they will be divided into 8 groups of 4 participants, being drawed again without repeating the first phase. Again the same process will be carried out as in the previous phase, Groups A2 to D2 will start on the first day, Groups E2 to H2 on the second day and again Groups A2 to D2 on the third day for 3 rounds. The best two of each group will qualify to the third and final phase.
The 16 characters that reaches this stage will face direct elimination from the eighterfinals until the final, in the eighther-finals they will faced against a character from another group, being paired in the following way, each match is numbered from 1 to 8.
1° A2 vs. 2° B2
1° C2 vs. 2° D2
1° E2 vs. 2° F2
1° G2 vs. 2° H2
1° B2 vs. 2° A2
1° D2 vs. 2° C2
1° F2 vs. 2° E2
1° H2 vs. 2° G2
In the quarterfinals the matches will be between the winners of Match 1 vs. Match 2, M3 vs. M4, M5 vs. M6 and M7 vs. M8 In the semifinals they will be among the winners of the first two previous matches and the last two between them, the winners advance to the Final, and the winner is consecrated the winner of the Customer Grand Tournament 2018.