2009–10 CONCACAF Champions League group stage

The group stage was played in 6 rounds from August to October 2009.

Tie-breaking criteria
The tie breaking procedures follow the same rules as the 2008–09 Champions League. If two teams are tied on points, the following tie-breaking criteria shall be applied, in order, to determine the ranking of teams:


 * 1) Greater number of points earned in matches between the teams concerned
 * 2) Greater goal difference in matches between the teams concerned
 * 3) Greater number of goals scored away from home in matches between the teams concerned
 * 4) Reapply first three criteria if two or more teams are still tied
 * 5) Greater goal  difference in all group matches
 * 6) Greater number of goals scored in group matches
 * 7) Greater number of goals scored away in all group matches
 * 8) Drawing of lots

Groups
All times EDT (UTC-4)