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The following is a list of notable events and developments that are related toPhilippine sports in 2021.^[1]

• August 28 –EJ Obiena finishes second place at the pole vault event atDiamond League inParis, France after breaking his personal best and national record for the Philippines at 5.91 meters.^[2]

• September 26 –Aries Delos Santos and Gerald Sibayan claimed 2021 Yonex Open NVBC men's doubles title after defeatingShlok Ramchandran and Victor Lai the finals, 21–15, 12-21 and 21–17.^[3]

• March 21 –Davao Occidental Tigers claims2021 MPBL finals championship after defeatingSan Juan Knights 3–1 in a best-of-5 series.^[4]
• May 18 – PresidentRodrigo Duterte signs into law thenaturalization ofAteneo Blue Eagles playerAngelo Kouame, allowing him to play for thePhilippines men's national basketball team.^[5]
• July 16 – The 46th season ofPhilippine Basketball Association officially opens at theYnares Sports Arena inPasig.^[6]
• August 11 – Mindanao finalistBasilan Peace Riders claims2021 Pilipinas Vismin Super Cup Southern Championship title after defeating Visayas finalist KCS Computer Specialists – Mandaue City 3–0 in the best-of-5 series.^[7]
• October 1 – ThePhilippines women's national basketball team finishes2021 FIBA Women's Asia Cup campaign at 7th place after defeatingIndia 74–70 to retain the Division A for the next tournament.^[8]
• October 28 –Filbasket'sinaugural season opens officially at the Subic Bay Gymnasium.
• October 29 – TheTNT Tropang Giga claims2021 PBA Philippine Cup championship after defeatingMagnolia Hotshots 4–1 in best-of-seven series.^[9]
• November 20 – The inaugural season of thePBA 3x3 league was officially open at theYnares Sports Arena inPasig.^[10]
• November 22 – AICC Manila claims theFilbasket Subic Championship title after defeating theSan Juan Knights in the finals 2–1 in best-of-three series.
• December 9 – TheMaharlika Pilipinas Basketball League was granted as professional status by theGames and Amusements Board.^[11]
• December 23 – TheBasilan Peace Riders claims2021 MPBL Invitational title after defeatingNueva Ecija Rice Vanguards at overtime score 83–80.^[12]

• May 30 –Nonito Donaire claimsWBCbantamweight championship after defeatingNordine Oubaali viaknockout on fourth round.^[13]
• August 3 –Nesthy Petecio claims thesilver medal of thewomen's featherweight event at the2020 Summer Olympics inTokyo after losing toJapan'sSena Irie via aunanimous decision in the final. Petecio becomes the first Filipino female boxer to win anOlympic medal for the Philippines.^[14]
• August 5 –Eumir Marcial claims thebronze medal of themen's middleweight event at the2020 Summer Olympics inTokyo after losing toUkraine'sOleksandr Khyzhniak via asplit decision in the semifinals.
• August 7 –Carlo Paalam claims thesilver medal of themen's flyweight event at the2020 Summer Olympics inTokyo after losing toGreat Britain'sGalal Yafai via asplit decision in the finals.^[15]
• August 15 –John Riel Casimero retainsWBO bantamweight championship after defeatingCuba'sGuillermo Rigondeaux viasplit decision.^[16]
• August 22:
  • Mark Magsayo claimsWBC featherweight championship after defeatingJulio Ceja viaknockout on tenth round.^[17]
  • Manny Pacquiao defeated byCuba'sYordenis Ugas viaunanimous decision to retain his opponent'sWBA welterweight championship.^[18]
• September 29 – Manny Pacquiao officially announced his retirement after 26 years of professional boxing career.^[19]
• October 31 –Jonas Sultan retainsWBO bantamweight title after defeatingPuerto Rico's Carlos Caraballo via unanimous decision.^[20]
• December 11 –Donnie Nietes retainsWBO International super-flyweight title after ended asplit draw withDominican Republic's Norberto Jimenez.^[21]
• December 12 – Nonito Donaire retainsWBCbantamweight championship after defeating fellow FilipinoReymart Gaballo viaknockout on fourth round.^[22]

• April 22 –Eugene Torre, the first AsianGrandmaster, becomes the first Asian male to be inducted into theWorld Chess Hall of Fame in the United States.^[23]

• September 19 –Carlo Biado claims2021 U.S. Open Pool Championship title after defeatingSingapore'sAloysius Yapp at score 13–8.^[24]

• June 14 –United City F.C. set an agreement withNew Clark City as their home venue, renaming them asUnited Clark F.C. for the upcoming2021 Philippines Football League.^[25]
• July 2 – PresidentRodrigo Duterte signs into law the naturalization of United City playerBienvenido Marañón, allowing him to play for thePhilippines national football team.^[26]
• November 19 –Kaya F.C.–Iloilo claims2021 Copa Paulino Alcantara title after defeatingAzkals Development Team at score 1–0.^[27]

• June 7 –Yuka Saso claims the2021 U.S. Women's Open title atThe Olympic Club inSan Francisco,California, becoming the first Filipino player to win a major golf championship.^[28]
• September 20 –Miguel Tabuena claimsPGA Idaho Open atQuail Hollow Club inIdaho, United States.^[29]

• September 23 –Carlos Yulo claims gold and bronze medal in 2021 All Japan Senior and Masters Gymnastics Championships inYamagata, Japan.^[30]
• October 24 – Carlos Yulo claims gold and silver medal in 2021 World Artistic Gymnastics Championships inKitakyushu, Japan.^[31]

• September 24 –Joshua Pacio retainsONE strawweight championship after defeatingYosuke Saruta viaknockout on first round atONE Championship 143: Revolution.^[32]

• January 24 –Alex Eala wins her first title in professional competition at theW15 Manacor round of the2021 ITF Women's World Tennis Tour inManacor, Spain, defeatingYvonne Cavallé Reimers of Spain, 5–7, 6–1, 6–2, in the final.^[33]

• March 28 –Jaja Santiago of theAgeo Medics becomes the first Filipino to win an international professional volleyball title, after her team wins the 2020–21 Japanese V.Cup title.^[34]
• July 17 – The2021 Premier Volleyball League Open Conference was officially open inLaoag, Ilocos Norte.^[35]
• August 13 –Chery Tiggo 7 Pro Crossovers claims2021 Premier Volleyball League Open Conference title after defeatingCreamline Cool Smashers in a do-or-die best-of-three series.^[36]
• October 7 – TheChoco Mucho andRebisco PH finishes 6th and 7th place respectively at2021 Asian Women's Club Volleyball Championship inThailand.^[37]
• October 13 – TheRebisco PH finishes2021 Asian Men's Club Volleyball Championship campaign at 9th place after defeatingSri Lanka's CEB Sports Club in 5 sets (25–14, 22–25, 25–18, 21–25, 15–11).^[38]
• November 25 – TheF2 Logistics Cargo Movers claims2021 PNVF Champions League for Women title after defeatingChery Tiggo 7 Pro Crossovers in three sets (25-20, 25–20, 25–22).^[39]
• December 4 – TheTeam Dasma Monarchs claims2021 PNVF Champions League for Men title after defeatingGo for Gold-Air Force Aguilas in four sets (19-25, 26–24, 25–18, 25–17).^[40]

• July 26 –Hidilyn Diaz wins theWomen's 55 kg event at the2020 Summer Olympics inTokyo, winningthe country's firstOlympic gold medal.^[41]

• January 10 – Alberto "Bert" Ortiz (b. 1959), former basketball player
• February 17 –Jacinto Cayco (b. c. 1924), swimmer and referee^[42]
• April 12 – Joselito "Joey" Ocampo (b. 1952), former basketball player
• April 25 –Genebert Basadre (b. 1984), boxer andSEA Games gold medalist^[43]
• April 26 – Mike Ochosa (b. 1965), sports analyst, writer, and entrepreneur
• August 12 –Haydée Coloso-Espino (b. 1937), swimmer^[44]
• August 26 –Rafael Hechanova (b. 1928), former basketball player
• September 1 –Leopoldo Serantes (b. 1962), bronze-medalist Olympic boxer^[45]
• September 2 –Josephine Medina (b. 1970), bronze-medalist Paralympic table tennis player^[46][47]
• September 22 –Mauricio "Moying" Martelino (b. 1935), former secretary-general of theAsian Basketball Confederation and chairman of thePhilippine Volleyball Federation
• September 24 – Jerome Yenson (b. 1996), baseball player (Adamson Soaring Falcons,Philippines national baseball team)
• September 30 –Leticia Gempisao (b. 1952) softball player
• October 14 –Vic Sison (b. 1936), football player
• November 11 – Freddie Lazarito (b. 1955), football coach
• December 19 – Ato Badolato (b. 1946), basketball coach
• December 26 – Lawrence Chongson (b. 1964), basketball coach

• 2021 in the Philippines
• 2021 in sports

• Philippine sport by year
• 2021 sport-related lists

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