Guardianes 2021 Liga MX final phase
The Torneo Guardianes 2021 (stylized as Guard1anes) Liga MX final phase was played between 8 May 2021 to 30 May 2021. A total of 12 teams competed in the final phase to decide the champions of the Guardianes 2021 Liga MX season. For the second straight season, an additional qualifying round, the reclassification or "repechaje", was employed, which expanded the number of playoff spots to 12. Both finalists qualified to the 2022 CONCACAF Champions League. Qualified teams. The following teams qualified for the championship stage. "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)." Reclassification. Summary. Matches took place on 8–9 May 2021. Seeding. The following was the final seeding for the final phase. The winners of the Reclassification matches were seeded based on their position in the classification table. Bracket. Quarter-finals. Summary. The first legs were played on 12–13 May, and the second legs were played on 15–16 May. Matches. Second leg. "1–1 on aggregate. Puebla advanced due to being the higher seed  in the classification table." "Cruz Azul won 4–3 on aggregate." "Santos Laguna won 3–2 on aggregate." "5–5 on aggregate. Pachuca won on away goals." Semi-finals. Summary. The first legs will be played on 19–20 May, and the second legs will be played on 22–23 May. Matches. Second leg. "Cruz Azul won 1–0 on aggregate." "Santos Laguna won 3–1 on aggregate." Finals. Summary. The first leg was played on 27 May, and the second leg was played on 30 May. Matches. Second leg. "Cruz Azul won 2–1 on aggregate."