2021 BWF World Championships – Men's singles
{{Short description|Badminton championships}}
{{Infobox sports competition event
| event = Men's singles
| championship = 2021 BWF World Championships
| dates = 12–19 December
| venue = Palacio de los Deportes Carolina Marín
| location = Huelva, Spain
| gold = Loh Kean Yew
| gold_nation = SGP
| silver = Srikanth Kidambi
| silver_nation = IND
| bronze = Lakshya Sen
| bronze_nation = IND
| bronze2 = Anders Antonsen
| bronze2_nation = DEN
| prev = 2019 Basel
| next = 2022 Tokyo
}}
{{2021 BWF World Championship}}
The men's singles tournament of the 2021 BWF World Championships took place from 12 to 19 December 2021 at the Palacio de los Deportes Carolina Marín at Huelva.{{cite web |title=Schedule|url=https://extranet.bwfbadminton.com/docs/events/3996/docs/TOTAL%20BWF%20World%20Championships%202021%20-%20Invitation.doc%201Nov2021_host.pdf|website=Badminton World Federation |date=28 November 2021}}
Seeds
{{See also|2021 BWF World Championships qualification#Men's singles}}
The seeding list is based on the World Rankings of 23 November 2021.{{cite web|title=TotalEnergies BWF World Championships 2021 – Seeding Report Version 1|url=https://extranet.bwfbadminton.com/docs/events/3996/docs/TotalEnergies%20BWF%20World%20Championships%202021%20-%20Seeding%20Report%20Version%201.pdf|website=Badminton World Federation|access-date=24 November 2021}}
{{col-begin}}{{col-2}}
- {{flagicon|JPN}} Kento Momota (withdrew)
- {{flagicon|DEN}} Viktor Axelsen (first round)
- {{flagicon|DEN}} Anders Antonsen (semi-finals)
- {{flagicon|TPE}} Chou Tien-chen (second round)
- {{flagicon|INA}} Anthony Sinisuka Ginting (withdrew)
- {{flagicon|MAS}} Lee Zii Jia (quarter-finals)
- {{flagicon|INA}} Jonatan Christie (withdrew)
- {{flagicon|HKG}} Ng Ka Long (first round)
{{col-2}}
- {{flagicon|JPN}} Kanta Tsuneyama (second round)
- {{flagicon|TPE}} Wang Tzu-wei (first round)
- {{flagicon|DEN}} Rasmus Gemke (third round)
- {{flagicon|IND}} Srikanth Kidambi (final)
- {{flagicon|HKG}} Lee Cheuk Yiu (third round)
- {{flagicon|IND}} B. Sai Praneeth (first round)
- {{flagicon|JPN}} Kenta Nishimoto (second round)
- {{flagicon|THA}} Kantaphon Wangcharoen (third round)
{{col-end}}
Draw
=Finals=
{{4TeamBracket-Tennis3
| RD1=Semi-finals
| RD2=Final
| team-width=150
| RD1-seed1=
| RD1-team1={{flagicon|IND}} Lakshya Sen
| RD1-score1-1=21
| RD1-score1-2=14
| RD1-score1-3=17
| RD1-seed2=12
| RD1-team2={{flagicon|IND}} Srikanth Kidambi
| RD1-score2-1=17
| RD1-score2-2=21
| RD1-score2-3=21
| RD1-seed3=3
| RD1-team3={{flagicon|DEN}} Anders Antonsen
| RD1-score3-1=21
| RD1-score3-2=14
| RD1-score3-3=
| RD1-seed4=
| RD1-team4={{flagicon|SGP}} Loh Kean Yew
| RD1-score4-1=23
| RD1-score4-2=21
| RD1-score4-3=
| RD2-seed1=12
| RD2-team1={{flagicon|IND}} Srikanth Kidambi
| RD2-score1-1=15
| RD2-score1-2=20
| RD2-score1-3=
| RD2-seed2=
| RD2-team2={{flagicon|SGP}} Loh Kean Yew
| RD2-score2-1=21
| RD2-score2-2=22
| RD2-score2-3=
}}
=Upper part=
==Groups 1==
{{16TeamBracket-Tennis3
| RD1=First Round
| RD2=Second Round
| RD3=Third Round
| RD4=Quarter-finals
| team-width=150
| RD1-seed01=1
| RD1-team01={{flagicon|JPN}} K Momota
| RD1-score01-1=
| RD1-score01-2=
| RD1-score01-3=
| RD1-seed02=
| RD1-team02={{flagicon|POL}} M Rogalski
| RD1-score02-1=w
| RD1-score02-2=/
| RD1-score02-3=o
| RD1-seed03=
| RD1-team03={{flagicon|NED}} J Kweekel
| RD1-score03-1=18
| RD1-score03-2=21
| RD1-score03-3=16
| RD1-seed04=
| RD1-team04={{flagicon|GUA}} K Cordón
| RD1-score04-1=21
| RD1-score04-2=10
| RD1-score04-3=21
| RD1-seed05=15
| RD1-team05={{flagicon|JPN}} K Nishimoto
| RD1-score05-1=21
| RD1-score05-2=21
| RD1-score05-3=
| RD1-seed06=
| RD1-team06={{flagicon|MAS}} Cheam J W
| RD1-score06-1=17
| RD1-score06-2=8
| RD1-score06-3=
| RD1-seed07=
| RD1-team07={{flagicon|IND}} L Sen
| RD1-score07-1=w
| RD1-score07-2=/
| RD1-score07-3=o
| RD1-seed08=
| RD1-team08={{flagicon|GER}} M Weißkirchen
| RD1-score08-1=
| RD1-score08-2=
| RD1-score08-3=
| RD1-seed09=7
| RD1-team09={{flagicon|INA}} J Christie
| RD1-score09-1=
| RD1-score09-2=
| RD1-score09-3=
| RD1-seed10=
| RD1-team10={{flagicon|IRL}} N Nguyen
| RD1-score10-1=w
| RD1-score10-2=/
| RD1-score10-3=o
| RD1-seed11=
| RD1-team11={{flagicon|FRA}} T J Popov
| RD1-score11-1=
| RD1-score11-2=
| RD1-score11-3=
| RD1-seed12=
| RD1-team12={{flagicon|ENG}} T Penty
| RD1-score12-1=w
| RD1-score12-2=/
| RD1-score12-3=o
| RD1-seed13=10
| RD1-team13={{flagicon|TPE}} Wang T-w
| RD1-score13-1=21
| RD1-score13-2=17
| RD1-score13-3=15
| RD1-seed14=
| RD1-team14={{flagicon|CHN}} Zhao JP
| RD1-score14-1=16
| RD1-score14-2=21
| RD1-score14-3=21
| RD1-seed15=
| RD1-team15={{flagicon|NGR}} A J Opeyori
| RD1-score15-1=11
| RD1-score15-2=1
| RD1-score15-3=
| RD1-seed16=
| RD1-team16={{flagicon|JPN}} K Watanabe
| RD1-score16-1=21
| RD1-score16-2=21
| RD1-score16-3=
| RD2-seed01=
| RD2-team01={{flagicon|POL}} M Rogalski
| RD2-score01-1=14
| RD2-score01-2=19
| RD2-score01-3=
| RD2-seed02=
| RD2-team02={{flagicon|GUA}} K Cordón
| RD2-score02-1=21
| RD2-score02-2=21
| RD2-score02-3=
| RD2-seed03=15
| RD2-team03={{flagicon|JPN}} K Nishimoto
| RD2-score03-1=20
| RD2-score03-2=21
| RD2-score03-3=18
| RD2-seed04=
| RD2-team04={{flagicon|IND}} L Sen
| RD2-score04-1=22
| RD2-score04-2=15
| RD2-score04-3=21
| RD2-seed05=
| RD2-team05={{flagicon|IRL}} N Nguyen
| RD2-score05-1=21
| RD2-score05-2=23
| RD2-score05-3=
| RD2-seed06=
| RD2-team06={{flagicon|ENG}} T Penty
| RD2-score06-1=17
| RD2-score06-2=21
| RD2-score06-3=
| RD2-seed07=
| RD2-team07={{flagicon|CHN}} Zhao JP
| RD2-score07-1=21
| RD2-score07-2=21
| RD2-score07-3=
| RD2-seed08=
| RD2-team08={{flagicon|JPN}} K Watanabe
| RD2-score08-1=11
| RD2-score08-2=15
| RD2-score08-3=
| RD3-seed01=
| RD3-team01={{flagicon|GUA}} K Cordón
| RD3-score01-1=13
| RD3-score01-2=8
| RD3-score01-3=
| RD3-seed02=
| RD3-team02={{flagicon|IND}} L Sen
| RD3-score02-1=21
| RD3-score02-2=21
| RD3-score02-3=
| RD3-seed03=
| RD3-team03={{flagicon|IRL}} N Nguyen
| RD3-score03-1=19
| RD3-score03-2=21
| RD3-score03-3=18
| RD3-seed04=
| RD3-team04={{flagicon|CHN}} Zhao JP
| RD3-score04-1=21
| RD3-score04-2=19
| RD3-score04-3=21
| RD4-seed01=
| RD4-team01={{flagicon|IND}} L Sen
| RD4-score01-1=21
| RD4-score01-2=15
| RD4-score01-3=22
| RD4-seed02=
| RD4-team02={{flagicon|CHN}} Zhao JP
| RD4-score02-1=15
| RD4-score02-2=21
| RD4-score02-3=20
}}
==Section 2==
{{16TeamBracket-Tennis3
| RD1=First Round
| RD2=Second Round
| RD3=Third Round
| RD4=Quarter-finals
| team-width=150
| RD1-seed01=4
| RD1-team01={{flagicon|TPE}} Chou T-c
| RD1-score01-1=21
| RD1-score01-2=21
|
| RD1-seed02=
| RD1-team02={{flagicon|THA}} S Thammasin
| RD1-score02-1=12
| RD1-score02-2=10
| RD1-score02-3=
| RD1-seed03=
| RD1-team03={{flagicon|THA}} K Vitidsarn
| RD1-score03-1=16
| RD1-score03-2=12
| RD1-score03-3=
| RD1-seed04=
| RD1-team04={{flagicon|CHN}} Lu GZ
| RD1-score04-1=21
| RD1-score04-2=21
| RD1-score04-3=
| RD1-seed05=12
| RD1-team05={{flagicon|IND}} S Kidambi
| RD1-score05-1=21
| RD1-score05-2=21
| RD1-score05-3=
| RD1-seed06=
| RD1-team06={{flagicon|ESP}} P Abián
| RD1-score06-1=12
| RD1-score06-2=16
| RD1-score06-3=
| RD1-seed07=
| RD1-team07={{flagicon|CHN}} Li SF
| RD1-score07-1=21
| RD1-score07-2=21
| RD1-score07-3=
| RD1-seed08=
| RD1-team08={{flagicon|USA}} T Lam
| RD1-score08-1=6
| RD1-score08-2=10
| RD1-score08-3=
| RD1-seed09=5
| RD1-team09={{flagicon|INA}} A S Ginting
| RD1-score09-1=
| RD1-score09-2=
| RD1-score09-3=
| RD1-seed10=
| RD1-team10={{flagicon|FRA}} T Rouxel
| RD1-score10-1=w
| RD1-score10-2=/
| RD1-score10-3=o
| RD1-seed11=
| RD1-team11={{flagicon|CAN}} B Yang
| RD1-score11-1=21
| RD1-score11-2=21
| RD1-score11-3=
| RD1-seed12=
| RD1-team12={{flagicon|POR}} B Atilano
| RD1-score12-1=15
| RD1-score12-2=8
| RD1-score12-3=
| RD1-seed13=14
| RD1-team13={{flagicon|IND}} B. Sai Praneeth
| RD1-score13-1=21
| RD1-score13-2=7
| RD1-score13-3=18
| RD1-seed14=
| RD1-team14={{flagicon|NED}} M Caljouw
| RD1-score14-1=17
| RD1-score14-2=21
| RD1-score14-3=21
| RD1-seed15=
| RD1-team15={{flagicon|MEX}} L Muñoz
| RD1-score15-1=8
| RD1-score15-2=8
| RD1-score15-3=
| RD1-seed16=
| RD1-team16={{flagicon|FIN}} K Koljonen
| RD1-score16-1=21
| RD1-score16-2=21
| RD1-score16-3=
| RD2-seed01=4
| RD2-team01={{flagicon|TPE}} Chou T-c
| RD2-score01-1=21
| RD2-score01-2=15
| RD2-score01-3=15
| RD2-seed02=
| RD2-team02={{flagicon|CHN}} Lu GZ
| RD2-score02-1=14
| RD2-score02-2=21
| RD2-score02-3=21
| RD2-seed03=12
| RD2-team03={{flagicon|IND}} S Kidambi
| RD2-score03-1=15
| RD2-score03-2=21
| RD2-score03-3=21
| RD2-seed04=
| RD2-team04={{flagicon|CHN}} Li SF
| RD2-score04-1=21
| RD2-score04-2=18
| RD2-score04-3=17
| RD2-seed05=
| RD2-team05={{flagicon|FRA}} T Rouxel
| RD2-score05-1=12
| RD2-score05-2=22
| RD2-score05-3=
| RD2-seed06=
| RD2-team06={{flagicon|CAN}} B Yang
| RD2-score06-1=21
| RD2-score06-2=24
| RD2-score06-3=
| RD2-seed07=
| RD2-team07={{flagicon|NED}} M Caljouw
| RD2-score07-1=14
| RD2-score07-2=22
| RD2-score07-3=21
| RD2-seed08=
| RD2-team08={{flagicon|FIN}} K Koljonen
| RD2-score08-1=21
| RD2-score08-2=20
| RD2-score08-3=11
| RD3-seed01=
| RD3-team01={{flagicon|CHN}} Lu GZ
| RD3-score01-1=10
| RD3-score01-2=15
| RD3-score01-3=
| RD3-seed02=12
| RD3-team02={{flagicon|IND}} S Kidambi
| RD3-score02-1=21
| RD3-score02-2=21
| RD3-score02-3=
| RD3-seed03=
| RD3-team03={{flagicon|CAN}} B Yang
| RD3-score03-1=20
| RD3-score03-2=12
| RD3-score03-3=
| RD3-seed04=
| RD3-team04={{flagicon|NED}} M Caljouw
| RD3-score04-1=22
| RD3-score04-2=21
| RD3-score04-3=
| RD4-seed01=12
| RD4-team01={{flagicon|IND}} S Kidambi
| RD4-score01-1=21
| RD4-score01-2=21
| RD4-score01-3=
| RD4-seed02=
| RD4-team02={{flagicon|NED}} M Caljouw
| RD4-score02-1=8
| RD4-score02-2=7
| RD4-score02-3=
}}
=Bottom half=
==Section 3==
{{16TeamBracket-Tennis3
| RD1=First Round
| RD2=Second Round
| RD3=Third Round
| RD4=Quarter-finals
| team-width=150
| RD1-seed01=
| RD1-team01={{flagicon|VIE}} Nguyễn T M
| RD1-score01-1=16
| RD1-score01-2=23
| RD1-score01-3=10
| RD1-seed02=
| RD1-team02={{flagicon|DEN}} H-K Vittinghus
| RD1-score02-1=21
| RD1-score02-2=21
| RD1-score02-3=21
| RD1-seed03=
| RD1-team03={{flagicon|RUS|variant=nbfr-badminton}} S Sirant
| RD1-score03-1=17
| RD1-score03-2=21
| RD1-score03-3=18
| RD1-seed04=9
| RD1-team04={{flagicon|JPN}} K Tsuneyama
| RD1-score04-1=21
| RD1-score04-2=17
| RD1-score04-3=21
| RD1-seed05=
| RD1-team05={{flagicon|BEL}} M Moreels
| RD1-score05-1=18
| RD1-score05-2=9
| RD1-score05-3=
| RD1-seed06=
| RD1-team06={{flagicon|BRA}} Y Coelho
| RD1-score06-1=21
| RD1-score06-2=21
| RD1-score06-3=
| RD1-seed07=
| RD1-team07={{flagicon|CAN}} J Ho-Shue
| RD1-score07-1=10
| RD1-score07-2=21
| RD1-score07-3=11
| RD1-seed08=6
| RD1-team08={{flagicon|MAS}} Lee Z J
| RD1-score08-1=21
| RD1-score08-2=17
| RD1-score08-3=21
| RD1-seed09=
| RD1-team09={{flagicon|TUR}} E Lale
| RD1-score09-1=15
| RD1-score09-2=16
| RD1-score09-3=
| RD1-seed10=
| RD1-team10={{flagicon|AZE}} A R Dwicahyo
| RD1-score10-1=21
| RD1-score10-2=21
| RD1-score10-3=
| RD1-seed11=
| RD1-team11={{flagicon|USA}} H Shu
| RD1-score11-1=8
| RD1-score11-2=14
| RD1-score11-3=
| RD1-seed12=13
| RD1-team12={{flagicon|HKG}} Lee C Y
| RD1-score12-1=21
| RD1-score12-2=21
| RD1-score12-3=
| RD1-seed13=
| RD1-team13={{flagicon|INA}} T Sugiarto
| RD1-score13-1=
| RD1-score13-2=
| RD1-score13-3=
| RD1-seed14=
| RD1-team14={{flagicon|SRI}} N Karunaratne
| RD1-score14-1=w
| RD1-score14-2=/
| RD1-score14-3=o
| RD1-seed15=
| RD1-team15={{flagicon|RUS|variant=nbfr-badminton}} V Malkov
| RD1-score15-1=16
| RD1-score15-2=13
| RD1-score15-3=
| RD1-seed16=3
| RD1-team16={{flagicon|DEN}} A Antonsen
| RD1-score16-1=21
| RD1-score16-2=21
| RD1-score16-3=
| RD2-seed01=
| RD2-team01={{flagicon|DEN}} H-K Vittinghus
| RD2-score01-1=11
| RD2-score01-2=21
| RD2-score01-3=21
| RD2-seed02=9
| RD2-team02={{flagicon|JPN}} K Tsuneyama
| RD2-score02-1=21
| RD2-score02-2=13
| RD2-score02-3=17
| RD2-seed03=
| RD2-team03={{flagicon|BRA}} Y Coelho
| RD2-score03-1=14
| RD2-score03-2=24
| RD2-score03-3=14
| RD2-seed04=6
| RD2-team04={{flagicon|MAS}} Lee Z J
| RD2-score04-1=21
| RD2-score04-2=22
| RD2-score04-3=21
| RD2-seed05=
| RD2-team05={{flagicon|AZE}} A R Dwicahyo
| RD2-score05-1=13
| RD2-score05-2=15
| RD2-score05-3=
| RD2-seed06=13
| RD2-team06={{flagicon|HKG}} Lee C Y
| RD2-score06-1=21
| RD2-score06-2=21
| RD2-score06-3=
| RD2-seed07=
| RD2-team07={{flagicon|SRI}} N Karunaratne
| RD2-score07-1=11
| RD2-score07-2=15
| RD2-score07-3=
| RD2-seed08=3
| RD2-team08={{flagicon|DEN}} A Antonsen
| RD2-score08-1=21
| RD2-score08-2=21
| RD2-score08-3=
| RD3-seed01=
| RD3-team01={{flagicon|DEN}} H-K Vittinghus
| RD3-score01-1=15
| RD3-score01-2=21
| RD3-score01-3=10
| RD3-seed02=6
| RD3-team02={{flagicon|MAS}} Lee Z J
| RD3-score02-1=21
| RD3-score02-2=15
| RD3-score02-3=21
| RD3-seed03=13
| RD3-team03={{flagicon|HKG}} Lee C Y
| RD3-score03-1=9
| RD3-score03-2=11
| RD3-score03-3=
| RD3-seed04=3
| RD3-team04={{flagicon|DEN}} A Antonsen
| RD3-score04-1=21
| RD3-score04-2=21
| RD3-score04-3=
| RD4-seed01=6
| RD4-team01={{flagicon|MAS}} Lee Z J
| RD4-score01-1=21
| RD4-score01-2=8
| RD4-score01-3=1r
| RD4-seed02=3
| RD4-team02={{flagicon|DEN}} A Antonsen
| RD4-score02-1=12
| RD4-score02-2=21
| RD4-score02-3=11
}}
==Section 4==
{{16TeamBracket-Tennis3
| RD1=First Round
| RD2=Second Round
| RD3=Third Round
| RD4=Quarter-finals
| team-width=150
| RD1-seed01=
| RD1-team01={{flagicon|MEX}} L Montoya
| RD1-score01-1=15
| RD1-score01-2=13
| RD1-score01-3=
| RD1-seed02=
| RD1-team02={{flagicon|ESP}} L E Peñalver
| RD1-score02-1=21
| RD1-score02-2=21
| RD1-score02-3=
| RD1-seed03=
| RD1-team03={{flagicon|FRA}} B Leverdez
| RD1-score03-1=13
| RD1-score03-2=7
| RD1-score03-3=
| RD1-seed04=11
| RD1-team04={{flagicon|DEN}} R Gemke
| RD1-score04-1=21
| RD1-score04-2=21
| RD1-score04-3=
| RD1-seed05=
| RD1-team05={{flagicon|MAS}} Liew D
| RD1-score05-1=21
| RD1-score05-2=21
| RD1-score05-3=
| RD1-seed06=
| RD1-team06={{flagicon|ISR}} M Zilberman
| RD1-score06-1=14
| RD1-score06-2=14
| RD1-score06-3=
| RD1-seed07=
| RD1-team07={{flagicon|IND}} Prannoy K
| RD1-score07-1=13
| RD1-score07-2=21
| RD1-score07-3=21
| RD1-seed08=8
| RD1-team08={{flagicon|HKG}} Ng K L
| RD1-score08-1=21
| RD1-score08-2=18
| RD1-score08-3=19
| RD1-seed09=
| RD1-team09={{flagicon|KOR}} Heo K-h
| RD1-score09-1=
| RD1-score09-2=
| RD1-score09-3=
| RD1-seed10=
| RD1-team10={{flagicon|GER}} K Schäfer
| RD1-score10-1=w
| RD1-score10-2=/
| RD1-score10-3=o
| RD1-seed11=
| RD1-team11={{flagicon|SWE}} F Burestedt
| RD1-score11-1=17
| RD1-score11-2=21
| RD1-score11-3=9
| RD1-seed12=16
| RD1-team12={{flagicon|THA}} K Wangcharoen
| RD1-score12-1=21
| RD1-score12-2=15
| RD1-score12-3=21
| RD1-seed13=
| RD1-team13={{flagicon|AUT}} L Wraber
| RD1-score13-1=w
| RD1-score13-2=/
| RD1-score13-3=o
| RD1-seed14=
| RD1-team14={{flagicon|INA}} S H Rhustavito
| RD1-score14-1=
| RD1-score14-2=
| RD1-score14-3=
| RD1-seed15=
| RD1-team15={{flagicon|SGP}} Loh K Y
| RD1-score15-1=14
| RD1-score15-2=21
| RD1-score15-3=21
| RD1-seed16=2
| RD1-team16={{flagicon|DEN}} V Axelsen
| RD1-score16-1=21
| RD1-score16-2=9
| RD1-score16-3=6
| RD2-seed01=
| RD2-team01={{flagicon|ESP}} L E Peñalver
| RD2-score01-1=20
| RD2-score01-2=12
| RD2-score01-3=
| RD2-seed02=11
| RD2-team02={{flagicon|DEN}} R Gemke
| RD2-score02-1=22
| RD2-score02-2=21
| RD2-score02-3=
| RD2-seed03=
| RD2-team03={{flagicon|MAS}} Liew D
| RD2-score03-1=7
| RD2-score03-2=17
| RD2-score03-3=
| RD2-seed04=
| RD2-team04={{flagicon|IND}} Prannoy K
| RD2-score04-1=21
| RD2-score04-2=21
| RD2-score04-3=
| RD2-seed05=
| RD2-team05={{flagicon|GER}} K Schäfer
| RD2-score05-1=14
| RD2-score05-2=14
| RD2-score05-3=
| RD2-seed06=16
| RD2-team06={{flagicon|THA}} K Wangcharoen
| RD2-score06-1=21
| RD2-score06-2=21
| RD2-score06-3=
| RD2-seed07=
| RD2-team07={{flagicon|AUT}} L Wraber
| RD2-score07-1=4
| RD2-score07-2=8
| RD2-score07-3=
| RD2-seed08=
| RD2-team08={{flagicon|SGP}} Loh K Y
| RD2-score08-1=21
| RD2-score08-2=21
| RD2-score08-3=
| RD3-seed01=11
| RD3-team01={{flagicon|DEN}} R Gemke
| RD3-score01-1=21
| RD3-score01-2=8
| RD3-score01-3=20
| RD3-seed02=
| RD3-team02={{flagicon|IND}} Prannoy K
| RD3-score02-1=16
| RD3-score02-2=21
| RD3-score02-3=22
| RD3-seed03=16
| RD3-team03={{flagicon|THA}} K Wangcharoen
| RD3-score03-1=4
| RD3-score03-2=7
| RD3-score03-3=
| RD3-seed04=
| RD3-team04={{flagicon|SGP}} Loh K Y
| RD3-score04-1=21
| RD3-score04-2=21
| RD3-score04-3=
| RD4-seed01=
| RD4-team01={{flagicon|IND}} Prannoy K
| RD4-score01-1=14
| RD4-score01-2=12
| RD4-score01-3=
| RD4-seed02=
| RD4-team02={{flagicon|SGP}} Loh K Y
| RD4-score02-1=21
| RD4-score02-2=21
| RD4-score02-3=
}}
References
{{Reflist}}
{{DEFAULTSORT:2021 BWF World Championships - Men's singles}}