| Serie 1 |
| Iñigo De Urruticoechea Theiler | Tabancura | 4 | 9.30 | 1 q |
| Tomas Castillo Erlwein | Tabancura | 5 | 9.66 | 7 |
| Gabriel Magrot Santa María | SSCC Manquehue | 3 | 9.82 | 11 |
| Mateo Sarni Petriella | San Esteban Diácono | 2 | 9.85 | 12 |
| Baltazar Vergara Chamorro | Saint George's College | 6 | 10.33 | 16 |
| Nicolás Sjögren Díaz | San Benito | 1 | 10.54 | 18 |
| Serie 2 |
| Ismael Castillo Alcalde | Tabancura | 4 | 9.52 | 3 q |
| León Sánchez Kübler | San Benito | 6 | 9.64 | 6 q |
| Martín Rossel Jarpa | SSCC Manquehue | 2 | 9.78 | 10 |
| Sergio Contardo Rioja | SSCC Manquehue | 3 | 9.90 | 13 |
| Juan Moreno Diaz | Saint George's College | 1 | 10.91 | 21 |
| Martin Morera Zietzke | San Esteban Diácono | 5 | DNS | |
| Serie 3 |
| Diego Lozano Merino | Saint George's College | 6 | 9.31 | 2 q |
| Santiago Martinez Echeverria | Tabancura | 4 | 9.53 | 4 q |
| Clemente Swett Undurraga | San Benito | 3 | 9.68 | 8 |
| Lucas Figueroa Tornero | San Benito | 5 | 9.69 | 9 |
| Clemente Avendaño González | SSCC Manquehue | 2 | 10.60 | 20 |
| Serie 4 |
| Andrés Cuadrado De La Sotta | San Benito | 4 | 9.53 | 5 q |
| Pedro Jara Mendez | Tabancura | 5 | 10.14 | 14 |
| Santiago Hasbún Hube | Saint George's College | 3 | 10.32 | 15 |
| Tomás Celedón Vial | Saint George's College | 6 | 10.33 | 17 |
| Felipe Undurraga San Martín | SSCC Manquehue | 2 | 10.57 | 19 |
