# 2021 World Athletics U20 Championships – Men's 100 metres

The men's 100 metres at the 2021 World Athletics U20 Championships was held at the Kasarani Stadium on 18 and 19 August.

## Records

Standing records prior to the 2021 World Athletics U20 Championships :
| World U20 Record | Trayvon Bromell (USA) | 9.97 | Eugene, United States | 13 June 2014 |
| Championship Record | Adam Gemili (GBR) | 10.05 | Barcelona, Spain | 11 July 2012 |
| World U20 Leading | Jaylen Slade (USA) | 10.09 | Clermont, United States | 30 May 2021 |

## Results
### Heats

Qualification: First 3 of each heat (Q) and the 6 fastest times (q) qualified for the semifinal.
Wind: Heat 1: +0.8 m/s, Heat 2: -1.4 m/s, Heat 3: +0.7 m/s, Heat 4: +1.0 m/s, Heat 5: 0.0 m/s, Heat 6: -0.7 m/s
| Rank | Heat | Name | Nationality | Time | Note |
| 1 | 3 | Letsile Tebogo | Botswana | 10.22 | Q, NU20R |
| 2 | 4 | Benjamin Richardson | South Africa | 10.28 | Q |
| 3 | 1 | Godson Oke Oghenebrume | Nigeria | 10.35 | Q |
| 4 | 2 | Shainer Reginfo | Cuba | 10.40 | Q, SB |
| 5 | 6 | Bryan Levell | Jamaica | 10.43 | Q |
| 6 | 5 | Oliwer Wdowik | Poland | 10.44 | Q, PB |
| 7 | 4 | Alicke Cranston | Jamaica | 10.45 | Q |
| 8 | 5 | Matteo Melluzzo | Italy | 10.46 | Q |
| 9 | 3 | Tarsis Orogot | Uganda | 10.48 | Q |
| 10 | 6 | Dominik Illovszky | Hungary | 10.51 | Q |
| 11 | 2 | Wendell Miller | Bahamas | 10.51 | Q, PB |
| 12 | 3 | Bradley Oliphant | South Africa | 10.52 | Q |
| 13 | 6 | Carlos Brown | Bahamas | 10.53 | Q, PB |
| 13 | 2 | Tomás Mondino | Argentina | 10.53 | Q |
| 15 | 1 | Almond Small | Canada | 10.54 | Q |
| 16 | 4 | Mahamat Zakaria Khalid | Qatar | 10.55 | Q |
| 17 | 4 | Angelo Ulisse | Italy | 10.57 | q |
| 18 | 6 | Ali Anwar Ali Al Balushi | Oman | 10.59 | q |
| 19 | 5 | Nazzio John | Grenada | 10.59 | Q |
| 20 | 3 | Gerardo Lomelí Ponce | Mexico | 10.60 | q |
| 21 | 1 | Yeykell Eliu Romero | Nicaragua | 10.60 | Q |
| 22 | 4 | Jayson Mandoze | Botswana | 10.62 | q |
| 23 | 5 | Bautista Diamante | Argentina | 10.63 | q |
| 24 | 5 | Eino Vuori | Finland | 10.66 | q |
| 25 | 1 | Eduard Kubelík | Czech Republic | 10.66 | |
| 26 | 6 | Sylvester Simiyu | Kenya | 10.66 | PB |
| 27 | 6 | Nikolaos Panagiotopoulos | Ukraine | 10.67 | |
| 28 | 4 | Steeven Salas | Ecuador | 10.67 | |
| 29 | 2 | Umut Uysal | Turkey | 10.69 | |
| 30 | 4 | Georgi Hristov | Bulgaria | 10.72 | |
| 31 | 2 | Katriel Angulo | Ecuador | 10.75 | |
| 32 | 1 | Falah Al-Khazaali | Iraq | 10.75 | |
| 33 | 1 | Igor Clemente Medeiros | Brazil | 10.77 | |
| 34 | 1 | Clinton Muunga | Zimbabwe | 10.79 | |
| 35 | 2 | Izaias Alves | Brazil | 10.79 | |
| 36 | 3 | Saif Al-Rammahi | Iraq | 10.79 | |
| 37 | 5 | Elvis Khikhoe Jr. Gaseb | Namibia | 10.87 | |
| 38 | 4 | Mohammed Soudd | Libya | 10.95 | PB |
| 39 | 2 | Favour Oghenetejiri Ashe | Nigeria | 11.00 | |
| 40 | 6 | Oleksandr Sosnovenko | Ukraine | 11.20 | |
| 41 | 3 | Ognjen Marsenić | Montenegro | 11.23 | |
| 42 | 5 | Sharon Loussanga | Republic of the Congo | 11.37 | PB |
| 43 | 2 | Arthur Quaqua | Liberia | 11.37 | PB |
| 44 | 3 | Maoulida Youssouf | Comoros | 11.50 | PB |
| | 3 | Ali Ghasem Babaei | Iran | DNF | |
| | 5 | Remigio Santander Villarubia | Equatorial Guinea | DQ | TR16.8 |
| | 6 | Josué Hepburn | Honduras | DNS | |

### Semifinals

Qualification: First 2 of each heat (Q) and the 2 fastest times (q) qualified for the final.
Wind: Heat 1: +0.5 m/s, Heat 2: +0.4 m/s, Heat 3: +0.8 m/s
| Rank | Heat | Name | Nationality | Time | Note |
| 1 | 1 | Letsile Tebogo | Botswana | 10.11 | Q, NR |
| 2 | 3 | Godson Oke Oghenebrume | Nigeria | 10.22 | Q |
| 3 | 2 | Ali Anwar Ali Al Balushi | Oman | 10.27 | Q, NU20R |
| 4 | 2 | Matteo Melluzzo | Italy | 10.29 | Q |
| 5 | 3 | Shainer Reginfo | Cuba | 10.29 | Q, PB |
| 6 | 2 | Benjamin Richardson | South Africa | 10.30 | q |
| 7 | 2 | Nazzio John | Grenada | 10.32 | q, PB |
| 8 | 3 | Tarsis Orogot | Uganda | 10.37 | |
| 9 | 1 | Oliwer Wdowik | Poland | 10.37 | Q, PB |
| 10 | 2 | Eino Vuori | Finland | 10.43 | PB |
| 11 | 2 | Wendell Miller | Bahamas | 10.45 | PB |
| 12 | 3 | Carlos Brown | Bahamas | 10.47 | PB |
| 13 | 1 | Bradley Oliphant | South Africa | 10.49 | |
| 14 | 3 | Dominik Illovszky | Hungary | 10.51 | |
| 15 | 1 | Almond Small | Canada | 10.53 | |
| 16 | 2 | Tomás Mondino | Argentina | 10.53 | |
| 17 | 3 | Jayson Mandoze | Botswana | 10.54 | PB |
| 18 | 3 | Mahamat Zakaria Khalid | Qatar | 10.54 | |
| 19 | 1 | Angelo Ulisse | Italy | 10.56 | |
| 20 | 1 | Bautista Diamante | Argentina | 10.59 | |
| 21 | 1 | Yeykell Eliu Romero | Nicaragua | 10.63 | |
| 22 | 3 | Gerardo Lomelí Ponce | Mexico | 10.72 | |
| 23 | 1 | Alicke Cranston | Jamaica | 10.94 | |
| | 2 | Bryan Levell | Jamaica | DQ | TR16.8 |

### Final

The final was held on 19 August at 18:27.
Wind: -0.2 m/s
| Rank | Lane | Name | Nationality | Time |
| | 7 | Letsile Tebogo | Botswana | 10.19 |
| | 3 | Benjamin Richardson | South Africa | 10.28 |
| | 9 | Shainer Reginfo | Cuba | 10.32 |
| 4 | 5 | Ali Anwar Ali Al-Balushi | Oman | 10.39 |
| 5 | 8 | Oliwer Wdowik | Poland | 10.46 |
| 6 | 6 | Matteo Melluzzo | Italy | 10.49 |
| 7 | 2 | Nazzio John | Grenada | 10.52 |
| 8 | 4 | Godson Oke Oghenebrume | Nigeria | 10.74 |