| Serie 1 |
| Julian Urbina Maldonado | Instituto Chacabuco | 2 | 10.54 | 2 q |
| Nicolas Hurtado Rivadeneira | Tabancura | 6 | 10.66 | 5 q |
| Nicolás Montané Schoor | San Benito | 1 | 11.03 | 7 |
| Lucas Davidson Landon | SSCC Manquehue | 3 | 11.39 | 12 |
| Gabriel Becerra Poindrelle | Lycée Antoine de Saint-Exupéry | 4 | DNS | |
| Martin Casali Irarrázabal | Saint George's College | 5 | DNS | |
| Serie 2 |
| Manuel Eyzaguirre Ugarte | Tabancura | 1 | 10.55 (10.5500) | 3 q |
| Matias De Castro Donoso | SSCC Manquehue | 4 | 11.09 | 8 |
| Tomás García Roberts | San Benito | 5 | 11.56 | 13 |
| Jean Pierre Zurita Mesina | Melipilla | 2 | DNS | |
| Antoine Michel Paz | Lycée Antoine de Saint-Exupéry | 3 | DNS | |
| Juan Ignacio Alfonso Muhe | Saint George's College | 6 | DNS | |
| Serie 3 |
| Vicente Vidal Valles | Saint George's College | 3 | 9.83 | 1 q |
| Lucas Atienza De Lo Reyes | SSCC Manquehue | 2 | 10.55 (10.5500) | 4 q |
| Alonso Hormazabal Covarrubias | Instituto Chacabuco | 4 | 10.87 | 6 q |
| Cristóbal Irarrázaval Riesco | Tabancura | 1 | 11.12 | 9 |
| Tomás Aguado Riquelmo | San Benito | 5 | 11.19 | 10 |
| Juan Pablo Ugarte Bustamante | Tabancura | 6 | 11.28 | 11 |
