2021 PBA Philippine Cup

The 2021 Philippine Cup, also known as the 2021 Honda PBA Philippine Cup for sponsorship reasons, was the first conference of the 2021 PBA season of the Philippine Basketball Association (PBA). The 43rd PBA Philippine Cup started on July 16, 2021, and ended on October 29, 2021. The tournament did not allow teams to hire foreign players or imports.

On August 3, the league announced that it will be suspending their games beginning August 4 after the government declared that Metro Manila will be under Enhanced Community Quarantine from August 6 to 20. The league have appealed to the Inter-Agency Task Force for the Management of Emerging Infectious Diseases (IATF-EID) if they can continue their tournament in Batangas, which is under a more relaxed quarantine restrictions.

On August 31, the tournament resumed and the games were played Don Honorio Ventura State University Gymnasium in Bacolor, Pampanga.

Format
The following format will be observed for the duration of the conference:
 * Single-round robin eliminations; 11 games per team; Teams are then seeded by basis on win–loss records.
 * Top eight teams will advance to the quarterfinals. In case of tie, playoff games will be held only for the #8 seed.
 * Quarterfinals:
 * QF1: #1 vs #8 (#1 twice-to-beat)
 * QF2: #2 vs #7 (#2 twice-to-beat)
 * QF3: #3 vs #6 (best-of-3 series)
 * QF4: #4 vs #5 (best-of-3 series)
 * Semifinals (best-of-7 series):
 * SF1: QF1 Winner vs. QF4 Winner
 * SF2: QF2 Winner vs. QF3 Winner
 * Finals (best-of-7 series)
 * F1: SF1 Winner vs SF2 Winner

Postponed games due to COVID-19

 * July 21: Terrafirma vs. Alaska and TNT vs. Magnolia
 * July 23: Rain or Shine vs. Terrafirma
 * July 24: Meralco vs. TNT
 * July 31: Blackwater vs. Phoenix
 * August 1: San Miguel vs. Barangay Ginebra
 * September 4: Alaska vs. San Miguel
 * September 5: Meralco vs. Barangay Ginebra

(1) TNT vs. (8) Barangay Ginebra
TNT has the twice-to-beat advantage; they have to be beaten twice, while their opponents just once, to advance.

(2) Meralco vs (7) NLEX
Meralco has the twice-to-beat advantage; they have to be beaten twice, while their opponents just once, to advance.

(3) Magnolia vs (6) Rain or Shine
This is a best-of-three playoff.

(4) San Miguel vs (5) NorthPort
This is a best-of-three playoff.

Semifinals
All match-ups are best-of-seven playoffs.

Finals
The Finals is a best-of-seven playoff.