| 1945 Copa Aldao | |
| Event: | Copa Aldao |
| Team1: | Peñarol |
| Team2: | River Plate |
| Team2association: |  |
| Details: | River Plate won 4–0 on points |
| Firstleg: | First leg |
| Team1score1: | 1 |
| Team2score1: | 2 |
| Date1: | December 6, 1945 |
| Stadium1: | Estadio Centenario |
| Referee1: | Nobel Valentini (Uruguay) |
| Secondleg: | Second leg |
| Team1score2: | 2 |
| Team2score2: | 3 |
| Referee2: | Eduardo Forte (Argentina) |
| Previous: | 1942 |
| Next: | 1947 |
The 1945 Copa Aldao was the final match to decide the winner of the Copa Aldao, the 16th edition of the international competition organised by the Argentine and Uruguayan Associations together.[1] The final was contested by Uruguayan club Peñarol and Argentine side River Plate.[2]
In the first match, played at Estadio Centenario in Montevideo, River Plate beat Peñarol 2–1 while in the second leg held in San Lorenzo de Almagro Stadium in Buenos Aires, River Plate beat again Peñarol 3–2 therefore achieving its fourth Copa Aldao trophy in five finals contested.[3] Besides, striker Ángel Labruna was the most notable player of River Plate, having scored all goals for the team (5) in both matches.[4]
| width=150px | Team | width=300px | Qualification | width=250px | Previous final app. |
|---|---|---|---|---|---|
| 1945 Argentine Primera División champion | 1936, 1937, 1941, 1942 | ||||
| 1945 Uruguayan Primera División champion | 1918, 1928, 1936, 1937, 1938 |
| GK | Roque Máspoli | |||
| DF | Agustín Prado | |||
| DF |  Sixto Possamay | |||
| MF | José Pedro Colturi | |||
| MF | Obdulio Varela | |||
| MF | Luis Prais | |||
| FW | Juan Manuel Ortiz | |||
| FW | Francisco Martiarena | |||
| FW | Raúl Schiaffino | |||
| FW | Óscar Chirimini | |||
| FW | ||||
| Manager: | ||||
| Alberto Supicci | ||||
| GK | Amadeo Carrizo | |||
| DF | Ricardo Vaghi | |||
| DF | E. Rodríguez | |||
| MF | Norberto Yácono | |||
| MF | Néstor Rossi | |||
| MF | José Ramos | |||
| FW | Juan Carlos Muñoz | |||
| FW | Alberto Gallo | |||
| FW | Adolfo Pedernera | |||
| FW | Ángel Labruna | |||
| FW | Félix Loustau | |||
| Manager: | ||||
| Carlos Peucelle | ||||
----
| GK | Amadeo Carrizo | |||
| DF | Ricardo Vaghi | |||
| DF | E. Rodríguez | |||
| MF | Norberto Yácono | |||
| MF | Néstor Rossi | |||
| MF | José Ramos | |||
| FW | Juan Carlos Muñoz | |||
| FW | Alberto Gallo | |||
| FW | Adolfo Pedernera | |||
| FW | Ángel Labruna | |||
| FW | Félix Loustau | |||
| Manager: | ||||
| Carlos Peucelle | ||||
| GK | Roque Máspoli | |||
| DF | Mario Lorenzo | |||
| DF | Sixto Possamay | |||
| MF | José Pedro Colturi | |||
| MF | Obdulio Varela | |||
| MF | Luis Prais | |||
| FW | Juan Manuel Ortiz | |||
| FW | Domingo Gelpi | |||
| FW | Raúl Schiaffino | |||
| FW | Óscar Chirimini | |||
| FW | ||||
| Manager: | ||||
| Alberto Supicci | ||||