| Serie 1 |
| Julián Rodríguez Heiremans | San Benito | 8 | 9.34 | 5 q |
| Lucas Eblen Camus | Tabancura | 5 | 9.63 | 11 |
| Gaspar Cuadra Martin | SSCC Manquehue | 6 | 9.78 | 16 |
| Fernando Sáez Udovik | Saint George's College | 3 | 9.90 | 22 |
| Manuel Alarcon Solavarria | San Esteban Diácono | 2 | 10.10 | 27 |
| Franco Goldschmidt Coquelet | Bradford School | 4 | 11.18 | 39 |
| Matias Reyes Winkler | Alemán de Santiago | 7 | 11.63 | 40 |
| Santiago Mcelroy M | Lycée Antoine de Saint-Exupéry | 1 | DNS | |
| Serie 2 |
| Andres Le Blanc Koehler | Tabancura | 6 | 9.39 | 6 q |
| Lucas Roccatagliata Cherniavski | SSCC Manquehue | 5 | 9.77 | 15 |
| León Velasco Baeza | Saint George's College | 4 | 9.85 | 19 |
| José Valdés Marinetti | Saint George's College | 2 | 9.86 | 20 |
| Federico Leon Cossio | Lycée Antoine de Saint-Exupéry | 7 | 10.11 | 28 |
| Emiliano Cortes Maass | Alemán de Santiago | 8 | 10.22 | 32 |
| Jose Maria Aqueveque Herrera | Alemán de Santiago | 1 | 10.46 | 35 |
| Beltrán Vender Allende | San Benito | 3 | DNS | |
| Serie 3 |
| Tomas Vial Vial | Tabancura | 3 | 9.25 | 4 q |
| Agustín Alonso Farías Hontavilla | SSCC Manquehue | 4 | 9.69 | 12 |
| Max Ariztía Rodriguez | Saint George's College | 1 | 9.81 | 17 |
| Tomás José Earle Carvajal | San Benito | 2 | 9.88 | 21 |
| León Sepúlveda Roberts | Saint George's College | 6 | 10.03 | 26 |
| Vicente Vasquez Donders | Alemán de Santiago | 8 | 10.16 | 29 |
| Lucas García Farré | Lycée Antoine de Saint-Exupéry | 7 | 10.54 | 36 |
| Lukas Sand Rivero | Alemán de Santiago | 5 | DNS | |
| Serie 4 |
| Manuel Covarrubias Hurtado | Tabancura | 2 | 9.20 | 2 q |
| Benjamin Ebensperger Soto | Tabancura | 6 | 9.22 | 3 q |
| Vicente Hector Ariztía Silva | San Benito | 3 | 9.70 | 13 |
| Camilo Benavente Bascuñan | Saint George's College | 7 | 9.91 | 23 |
| Clemente Bello Baraona | SSCC Manquehue | 4 | 9.98 | 25 |
| Juan Diego Motta Thonet | SSCC Manquehue | 5 | 10.18 | 30 |
| Javier Gardiazabal Velasco | Alemán de Santiago | 8 | 10.95 | 38 |
| Serie 5 |
| José Pedro Paredes Jaman | Tabancura | 6 | 9.43 | 7 q |
| Juan Carlos Riesco Larrain | Tabancura | 7 | 9.46 | 9 |
| Benjamín Rodriguez Olmedo | Saint George's College | 4 | 9.52 | 10 |
| Facundo José Vargas Sinclair | SSCC Manquehue | 2 | 9.94 | 24 |
| Lucas Agustín Trujillo Urzúa | SSCC Manquehue | 1 | 10.21 | 31 |
| Juan José Pastorino Del Valle | San Benito | 5 | 10.68 | 37 |
| Juan Pedro San Martin Gonzalez | Alemán de Santiago | 3 | 12.03 | 41 |
| Serie 6 |
| Jose Pedro Reyes Larraín | Tabancura | 2 | 8.95 | 1 q |
| Jose Antonio Cortés Santander | San Esteban Diácono | 6 | 9.45 | 8 q |
| Tomás Tapia Bottinelli | SSCC Manquehue | 5 | 9.71 | 14 |
| Eloy Klein Trucco | Saint George's College | 7 | 9.83 | 18 |
| Benito Barba Martin | Alemán de Santiago | 4 | 10.41 | 33 |
| Sebastian Jabconsen Duran | Bradford School | 1 | 10.43 | 34 |
| Pelayo Irarrazabal Señoret | San Benito | 3 | DNS | |
