The 2019 Copa Libertadores group stage will be played from 5 March to 9 May 2019. A total of 32 teams compete in the group stage to decide the 16 places in the final stages of the 2019 Copa Libertadores.
Teams were seeded by their CONMEBOL ranking of the Copa Libertadores as of 15 December 2018 (shown in parentheses), taking into account the following three factors:
Performance in the last 10 years, taking into account Copa Libertadores results in the period 2009–2018
Historical coefficient, taking into account Copa Libertadores results in the period 1960–2008
Local tournament champion, with bonus points awarded to domestic league champions of the last 10 years
For the group stage, the 32 teams were drawn into eight groups (Groups A–H) of four containing a team from each of the four pots. Teams from the same association could not be drawn into the same group, excluding the winners of the third stage, which were allocated to Pot 4 and whose identity was not known at the time of the draw, and could be drawn into the same group with another team from the same association.
In the group stage, each group is played on a home-and-away round-robin basis. The teams are ranked according to points (3 points for a win, 1 point for a draw, and 0 points for a loss). If tied on points, the following criteria will be used to determine the ranking: 1. Goal difference; 2. Goals scored; 3. Away goals scored; 4. CONMEBOL ranking (Regulations Article 28).
^The Deportivo Lara v Emelec match was originally scheduled on 7 March 2019, 22:00 local time but was suspended due to a nationwide power outage in Venezuela. It was rescheduled to 8 March 2019, 15:00 local time.
^The Cruzeiro v Deportivo Lara match was originally scheduled on 13 March 2019, 19:15 local time but was rescheduled to 27 March 2019, 21:30 local time.