The following is a list of notable events and developments that are related to Philippine sports in 2021. Events Athletics August 28 – EJ Obiena finishes second place at the pole vault event at Diamond League in Paris, France after breaking his personal best and national record for the Philippines at 5.91 meters. Badminton September 26 – Aries Delos Santos and Gerald Sibayan claimed 2021 Yonex Open NVBC men's doubles title after defeating Shlok Ramchandran and Victor Lai the finals, 21–15, 12-21 and 21–17. Basketball March 21 – Davao Occidental Tigers claims 2021 MPBL Finals championship after defeating San Juan Knights 3–1 in a best-of-5 series. May 18 – President Rodrigo Duterte signs into law the naturalization of Ateneo Blue Eagles player Angelo Kouame, allowing him to play for the Philippines men's national basketball team. July 16 – The 46th season of Philippine Basketball Association officially opens at the Ynares Sports Arena in Pasig. August 11 – Mindanao finalist Basilan Peace Riders claims 2021 Pilipinas Vismin Super Cup Southern Championship title after defeating Visayas finalist KCS Computer Specialists – Mandaue City 3–0 in the best-of-5 series. October 1 – The Philippines women's national basketball team finishes 2021 FIBA Women's Asia Cup campaign at 7th place after defeating India 74–70 to retain the Division A for the next tournament. October 28 – Filbasket's inaugural season opens officially at the Subic Bay Gymnasium. October 29 – The TNT Tropang Giga claims 2021 PBA Philippine Cup championship after defeating Magnolia Hotshots 4–1 in best-of-seven series. November 20 – The inaugural season of the PBA 3x3 league was officially open at the Ynares Sports Arena in Pasig. November 22 – AICC Manila claims the Filbasket Subic Championship title after defeating the San Juan Knights in the finals 2–1 in best-of-three series. December 9 – The Maharlika Pilipinas Basketball League was granted as professional status by the Games and Amusements Board. December 23 – The Basilan Peace Riders claims 2021 MPBL Invitational title after defeating Nueva Ecija Rice Vanguards at overtime score 83–80. Boxing May 30 – Nonito Donaire claims WBC bantamweight championship after defeating Nordine Oubaali via knockout on fourth round. August 3 – Nesthy Petecio claims the silver medal of the women's featherweight event at the 2020 Summer Olympics in Tokyo after losing to Japan's Sena Irie via a unanimous decision in the final. Petecio becomes the first Filipino female boxer to win