The Torneo Guardianes 2021 (stylized as Guard1anes) Liga MX final phase[1] was played between 8 May 2021 to 30 May 2021.
[2] A total of 12 teams competed in the final phase to decide the champions of the Guardianes 2021 Liga MX season.
[3] For the second straight season, an additional qualifying round, the reclassification or repechaje, was employed, which expanded the number of playoff spots to 12.
In the following tables, the number of appearances, last appearance, and previous best result count only those in the short tournament era starting from Invierno 1996 (not counting those in the long tournament era from 1943–44 to 1995–96).
The winners of the Reclassification matches were seeded based on their position in the classification table.