2017 Copa Sudamericana first stage

The 2017 Copa Sudamericana first stage was played from 28 February to 1 June 2017. A total of 44 teams competed in the first stage to decide the 22 of the 32 places in the second stage of the 2017 Copa Sudamericana.

Draw
 The draw for the first stage was held on 31 January 2017, 21:00 PYST (UTC−3), at the CONMEBOL Convention Centre in Luque, Paraguay. For the first stage, the teams were divided into two pots according to their geographical zones:
 * Pot A (South Zone): 22 teams from Argentina, Bolivia, Chile, Paraguay, and Uruguay
 * Pot B (North Zone): 22 teams from Brazil, Colombia, Ecuador, Peru, and Venezuela

The 44 teams were drawn into 22 ties (G1–G22) between a team from Pot A and a team from Pot B, with the teams from Pot B hosting the second leg in odd-numbered ties, and the teams from Pot A hosting the second leg in even-numbered ties. This distribution ensured that teams from the same association could not be drawn into the same tie.

Format
 In the first stage, each tie was played on a home-and-away two-legged basis. If tied on aggregate, the away goals rule would be used. If still tied, extra time would not be played, and the penalty shoot-out would be used to determine the winner (Regulations Article 6.1).

The 22 winners of the first stage advanced to the second stage to join the 10 teams transferred from the Copa Libertadores (two best teams eliminated in the third stage of qualifying and eight third-placed teams in the group stage).

Matches
The first legs were played on 28 February, 1–2 March, and 4–6 April, and the second legs were played on 9–11 May, 30–31 May and 1 June 2017. 


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Match G1
Nacional Potosí won 4–3 on aggregate and advanced to the second stage.

Match G2
Tied 2–2 on aggregate, Deportivo Cali won on away goals and advanced to the second stage.

Match G3
Universidad Católica won 6–1 on aggregate and advanced to the second stage.

Match G4
LDU Quito won 4–3 on aggregate and advanced to the second stage.

Match G5
Tied 1–1 on aggregate, Patriotas won on penalties and advanced to the second stage.

Match G6
Sol de América won 10–3 on aggregate and advanced to the second stage.

Match G7
Cerro Porteño won 3–2 on aggregate and advanced to the second stage.

Match G8
Huracán won 4–3 on aggregate and advanced to the second stage.

Match G9
Tied 2–2 on aggregate, Oriente Petrolero won on penalties and advanced to the second stage.

Match G10
Corinthians won 4–1 on aggregate and advanced to the second stage.

Match G11
Independiente won 1–0 on aggregate and advanced to the second stage.

Match G12
Tied 1–1 on aggregate, Ponte Preta won on away goals and advanced to the second stage.

Match G13
Boston River won 4–2 on aggregate and advanced to the second stage.

Match G14
Arsenal won 8–1 on aggregate and advanced to the second stage.

Match G15
Fuerza Amarilla won 2–1 on aggregate and advanced to the second stage.

Match G16
Tied 2–2 on aggregate, Bolívar won on away goals and advanced to the second stage.

Match G17
Tied 1–1 on aggregate, Palestino won on penalties and advanced to the second stage.

Match G18
Tied 3–3 on aggregate, Sport Recife won on penalties and advanced to the second stage.

Match G19
Racing won 2–1 on aggregate and advanced to the second stage.

Match G20
Tied 3–3 on aggregate, Nacional won on penalties and advanced to the second stage.

Match G21
Tied 1–1 on aggregate, Defensa y Justicia won on away goals and advanced to the second stage.

Match G22
Fluminense won 2–1 on aggregate and advanced to the second stage.