2018 Copa Sudamericana
The 2018 Copa CONMEBOL Sudamericana was the 17th edition of the CONMEBOL Sudamericana, South America's secondary club football tournament organized by CONMEBOL.
Brazilian club Atlético Paranaense defeated Colombian club Junior by 4–3 on penalties in the finals after a 2–2 draw on aggregate score to win their first tournament title. As champions, Atlético Paranaense earned the right to play against the winners of the 2018 Copa Libertadores in the 2019 Recopa Sudamericana, and the winners of the 2018 J.League Cup in the 2019 J.League Cup / Copa Sudamericana Championship. They also automatically qualified for the 2019 Copa Libertadores group stage. Independiente were the defending champions, but did not play in this edition as they qualified for the 2018 Copa Libertadores group stage as Copa Sudamericana champions and later advanced to the knockout stage.
Teams
The following 44 teams from the 10 CONMEBOL associations qualified for the tournament, entering the first stage:- Argentina and Brazil: 6 berths each
- All other associations: 4 berths each
| Association | Team | Qualification method |
 Argentina | San Lorenzo | 2016–17 Primera División best team not qualified for 2018 Copa Libertadores |
| Argentina | Lanús | 2016–17 Primera División 2nd best team not qualified for 2018 Copa Libertadores |
| Argentina | Newell's Old Boys | 2016–17 Primera División 3rd best team not qualified for 2018 Copa Libertadores |
| Argentina | Defensa y Justicia | 2016–17 Primera División 4th best team not qualified for 2018 Copa Libertadores |
| Argentina | Colón | 2016–17 Primera División 5th best team not qualified for 2018 Copa Libertadores |
| Argentina | Rosario Central | 2016–17 Primera División 6th best team not qualified for 2018 Copa Libertadores |
 Bolivia | Blooming | 2016–17 Primera División aggregate table best team not qualified for 2018 Copa Libertadores |
| Bolivia | Guabirá | 2016–17 Primera División aggregate table 2nd best team not qualified for 2018 Copa Libertadores |
| Bolivia | San José | 2016–17 Primera División aggregate table 3rd best team not qualified for 2018 Copa Libertadores |
| Bolivia | Nacional Potosí | 2016–17 Primera División aggregate table 4th best team not qualified for 2018 Copa Libertadores |
 Brazil | Atlético Mineiro | 2017 Campeonato Brasileiro Série A best team not qualified for 2018 Copa Libertadores |
| Brazil | Botafogo | 2017 Campeonato Brasileiro Série A 2nd best team not qualified for 2018 Copa Libertadores |
| Brazil | Atlético Paranaense | 2017 Campeonato Brasileiro Série A 3rd best team not qualified for 2018 Copa Libertadores |
| Brazil | Bahia | 2017 Campeonato Brasileiro Série A 4th best team not qualified for 2018 Copa Libertadores |
| Brazil | São Paulo | 2017 Campeonato Brasileiro Série A 5th best team not qualified for 2018 Copa Libertadores |
| Brazil | Fluminense | 2017 Campeonato Brasileiro Série A 6th best team not qualified for 2018 Copa Libertadores |
 Chile | Unión Española | 2017 Primera División runners-up playoff losers |
| Chile | Everton | 2017 Transición best team not qualified for 2018 Copa Libertadores |
| Chile | Audax Italiano | 2017 Transición 2nd best team not qualified for 2018 Copa Libertadores |
| Chile | Deportes Temuco | 2017 Transición 3rd best team not qualified for 2018 Copa Libertadores |
 Colombia | Independiente Medellín | 2017 Primera A aggregate table best team not qualified for 2018 Copa Libertadores |
| Colombia | América | 2017 Primera A aggregate table 2nd best team not qualified for 2018 Copa Libertadores |
| Colombia | Deportivo Cali | 2017 Primera A aggregate table 3rd best team not qualified for 2018 Copa Libertadores |
| Colombia | Jaguares | 2017 Primera A aggregate table 4th best team not qualified for 2018 Copa Libertadores |
 Ecuador | Barcelona | 2017 Serie A aggregate table best team not qualified for 2018 Copa Libertadores |
| Ecuador | El Nacional | 2017 Serie A aggregate table 2nd best team not qualified for 2018 Copa Libertadores |
| Ecuador | Deportivo Cuenca | 2017 Serie A aggregate table 3rd best team not qualified for 2018 Copa Libertadores |
| Ecuador | LDU Quito | 2017 Serie A Copa Sudamericana playoff winners |
 Paraguay | Sol de América | 2017 Primera División aggregate table best team not qualified for 2018 Copa Libertadores |
| Paraguay | General Díaz | 2017 Primera División aggregate table 2nd best team not qualified for 2018 Copa Libertadores |
| Paraguay | Sportivo Luqueño | 2017 Primera División aggregate table 3rd best team not qualified for 2018 Copa Libertadores |
| Paraguay | Nacional | 2017 Primera División aggregate table 4th best team not qualified for 2018 Copa Libertadores |
 Peru | UTC | 2017 Descentralizado aggregate table best team not qualified for 2018 Copa Libertadores |
| Peru | Sport Huancayo | 2017 Descentralizado aggregate table 2nd best team not qualified for 2018 Copa Libertadores |
| Peru | Sport Rosario | 2017 Descentralizado aggregate table 3rd best team not qualified for 2018 Copa Libertadores |
| Peru | Sporting Cristal | 2017 Descentralizado aggregate table 4th best team not qualified for 2018 Copa Libertadores |
 Uruguay | Cerro | 2017 Primera División aggregate table best team not qualified for 2018 Copa Libertadores |
| Uruguay | Boston River | 2017 Primera División aggregate table 2nd best team not qualified for 2018 Copa Libertadores |
| Uruguay | Rampla Juniors | 2017 Primera División aggregate table 3rd best team not qualified for 2018 Copa Libertadores |
| Uruguay | Danubio | 2017 Primera División aggregate table 4th best team not qualified for 2018 Copa Libertadores |
 Venezuela | Mineros | 2017 Copa Venezuela champions |
| Venezuela | Estudiantes de Mérida | 2017 Clausura classification table best team not qualified for 2018 Copa Libertadores |
| Venezuela | Caracas | 2017 Apertura runners-up |
| Venezuela | Zamora | 2017 Primera División aggregate table best team not qualified for 2018 Copa Libertadores |
A further 10 teams eliminated from the 2018 Copa Libertadores were transferred to the Copa Sudamericana, entering the [|second stage].
| Best teams eliminated in third stage |
| Jorge Wilstermann |
| Banfield |
| Third-placed teams in group stage |
| Defensor Sporting |
| Bolívar |
| Peñarol |
| Santa Fe |
| Vasco da Gama |
| Nacional |
| Millonarios |
| Junior |