2003 Torneo Apertura (Chile)
The 2003 Campeonato Nacional Apertura Copa Banco del Estado was the 73rd Chilean League top flight tournament, in which Cobreloa won its sixth league title after eight years.
Qualifying Stage
Scores
Group standings
Group A
Group B
Group C
Group D
Aggregate table
Repechaje
qualify to playoffs as best placed team despite having drawn with Unión San Felipe.| Match | Home | Visitor | Result |
| 1 | Unión San Felipe | Santiago Wanderers | 2–2 |
Playoffs
First round
and Huachipato qualified as best losers.| Match | Home | Visitor | 1st Leg | 2nd Leg | Aggregate |
| 1 | Cobresal | Colo-Colo | 3–0 | 1–2 | 4–2 |
| 2 | Cobreloa | Unión Española | 3–3 | 3–2 | 6–5 |
| 3 | Universidad de Concepción | Universidad de Chile | 0–0 | 4–3 | 4–3 |
| 4 | Universidad Católica | Huachipato | 2–1 | 1–1 | 3–2 |
| 5 | Deportes Puerto Montt | Rangers | 1–2 | 3–0 | 4–2 |
| 6 | Santiago Wanderers | Audax Italiano | 0–0 | 3–0 | 3–0 |
Knockout stage
Finals
----Top goalscorers
Pre-Copa Sudamericana 2003 Tournament
All sixteen first level teams took part in this tournament, plus -and only for this edition-, all sixteen second level teams took part as well. One of the qualified teams to the Copa Sudamericana coming from this division, Provincial Osorno.First round
Played on July 9 & 10, 2003| Home team | Score | Away team |
| Deportes Arica | 1–5 | Universidad de Chile |
| Deportes Antofagasta | 3–0 | Cobreloa |
| Deportes Copiapó | 1–0 | Cobresal |
| Deportes La Serena | 2–2 | Coquimbo Unido |
| Unión La Calera | 0–2 | Universidad Católica |
| Everton | 2–0 | Santiago Wanderers |
| Deportes Melipilla | 1–0 | Unión San Felipe |
| O'Higgins | 5–2 | Audax Italiano |
| Fernandez Vial | 1–0 | Universidad de Concepción |
| Lota Schwager | 0–2 | Huachipato |
| Deportes Talcahuano | 0–1 | Deportes Temuco |
| Provincial Osorno | 1–0 | Deportes Puerto Montt |
| Deportes Ovalle | 4–3 aet | Colo-Colo |
| Santiago Morning | 2–3 | Palestino |
| Magallanes | 5–2 | Unión Española |
| Rangers | 3–0 | Deportes Concepción |
Second round
Played on July 13, 2003| Home team | Score | Away team |
| Deportes Antofagasta | 2–1 aet | Universidad de Chile |
| Coquimbo Unido | 2–1 | Deportes Copiapó |
| Universidad Católica | 0–0 | Deportes Ovalle |
| Everton | 4–0 | Deportes Melipilla |
| Magallanes | 2–3 | Palestino |
| O'Higgins | 2–1 aet | Rangers |
| Huachipato | 2–1 | Fernandez Vial |
| Provincial Osorno | 1–0 | Deportes Temuco |
Third round
Played on July 16 & 17, 2003| Home team | Score | Away team |
| Everton | 2–2 | Universidad Católica |
| Deportes Antofagasta | 4–2 | Coquimbo Unido |
| O'Higgins | 1–3 | Palestino |
| Provincial Osorno | 2–1 | Huachipato |