| 24-Feb-07 Apertura 2007 - M.5 | | Unión | 2-2 | Audax | | |
| 16-Aug-07 Clausura 2007 - M.5 | Grupos | Audax | 2-0 | Unión | | |
| 01-Feb-08 Apertura 2008 - M.2 | Grupos | Unión | 1-0 | Audax | | Osses |
| 28-Jun-08 Clausura 2008 - M.2 | Grupos | Audax | 0-0 | Unión | | Gamboa, E |
| 01-Mar-09 Apertura 2009 - M.6 | Fase Regular | Audax | 2-2 | Unión | | Puga |
| 06-Sep-09 Clausura 2009 - M.6 | Fase Regular | Unión | 2-4 | Audax | | Pozo |
| 31-Jan-10 Primera A 2010 - M.2 | | Unión | 2-2 | Audax | | Gamboa, E |
| 06-Aug-10 Primera A 2010 - M.19 | | Audax | 5-2 | Unión | | Puga |
| 15-Dec-10 Libert Playoff 2010 - M.3 | Final | Unión | 2-1 | Audax | | Osorio |
| 19-Dec-10 Libert Playoff 2010 - M.4 | Final | Audax | 1-1 | Unión | | Pozo |
| 15-May-11 Apertura 2011 - M.16 | Fase Regular | Audax | 1-2 | Unión | | Osses |
| 19-Nov-11 Clausura 2011 - M.16 | Fase Regular | Unión | 5-2 | Audax | | Polic |
| 29-Jan-12 Apertura 2012 - M.1 | Fase Regular | Audax | 0-2 | Unión | | Fuenzalida |
| 07-Jul-12 Clausura 2012 - M.1 | Fase Regular | Unión | 3-3 | Audax | | Puga |
| 05-Sep-12 Copa Chile 2012 - M.5 | Grupo 4 | Unión | 2-0 | Audax | | Fuenzalida |
| 17-Oct-12 Copa Chile 2012 - M.8 | Grupo 4 | Audax | 0-3 | Unión | | Blanca |
| 15-Feb-13 Primera A 2013 - M.4 | | Unión | 4-0 | Audax | | Gamboa, E |
| 05-Oct-13 Apertura 2013 - M.10 | | Audax | 0-2 | Unión | | Acosta |
| 06-Mar-14 Clausura 2014 - M.10 | | Unión | 3-2 | Audax | | Tobar |
| 19-Jul-14 Apertura 2014 - M.1 | | Audax | 0-1 | Unión | | Bascuñán |
| 05-Jan-15 Clausura 2015 - M.1 | | Unión | 0-2 | Audax | | Tobar |
| 07-Oct-15 Copa Chile 2015 - M.9 | Quarter-finals | Audax | 0-0 | Unión | | Tobar |
| 11-Oct-15 Copa Chile 2015 - M.10 | Quarter-finals | Unión | 3-2
(0-0) | Audax | | Puga |
| 09-Nov-15 Apertura 2015 - M.12 | | Unión | 3-2 | Audax | | Maza |
| 12-Sep-16 Apertura 2016 - M.6 | | Audax | 3-1 | Unión | | |
| 03-Dec-17 Primera A 2017 - M.14 | | Audax | 0-2 | Unión | | Osorio |
| 27-May-18 Primera A 2018 - M.15 | | Audax | 1-1 | Unión | | Rojas, C |
| 23-Jun-18 Copa Chile 2018 - M.5 | Round of 16 | Audax | 2-0 | Unión | | Rojas, C |
| 30-Jun-18 Copa Chile 2018 - M.6 | Round of 16 | Unión | 0-1 | Audax | | Arrué |
| 21-Jul-18 Primera A 2018 - M.16 | | Unión | 2-4 | Audax | | Hermosilla |
| 28-Apr-19 Primera 2019 - M.10 | | Unión | 0-2 | Audax | | Tobar |
| 31-Aug-19 Primera 2019 - M.20 | | Audax | 3-2 | Unión | | Hermosilla |
| 08-Sep-19 Copa Chile 2019 - M.7 | Quarter-finals | Audax | 0-1 | Unión | | Rojas, C |
| 12-Oct-19 Copa Chile 2019 - M.8 | Quarter-finals | Unión | 2-1 | Audax | | Bascuñán |
| 17-Feb-20 Primera 2020 - M.4 | | Unión | 1-2 | Audax | | Gamboa, E |
| 04-Jan-21 Primera 2020 - M.27 | | Audax | 2-2 | Unión | | Cabero |
| 01-May-21 Primera 2021 - M.6 | | Unión | 1-1 | Audax | | Rojas, C |
| 30-Sep-21 Primera 2021 - M.23 | | Audax | 2-0 | Unión | | Carvajal, R |
| 03-Apr-22 Primera 2022 - M.8 | | Audax | - | Unión | | |
| 09-Feb-23 Primera 2023 - M.4 | | Audax | 1-1 | Unión | | Abarzúa |
| 29-Jul-23 Primera 2023 - M.19 | | Unión | 3-0 | Audax | | Gilabert |
| 09-Mar-24 Primera 2024 - M.4 | | Unión | 3-0 | Audax | | Flores |
| 11-Aug-24 Primera 2024 - M.19 | | Audax | 1-1 | Unión | | Vejar |
| 06-Feb-25 Copa Chile 2025 - M.3 | Group E | Audax | 3-1 | Unión | | Gilabert |
| 21-Mar-25 Copa Chile 2025 - M.4 | Group E | Unión | 0-0 | Audax | | Flores |
| 14-Sep-25 Primera 2025 - M.23 | | Unión | - | Audax | | |
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