2021 Liga DIMAYOR

Format

• Two tournaments with three stages each were played in the season. The Torneo Apertura was contested by 19 teams, while the Torneo Finalización was played by 20 teams.
• The first stage of both tournaments was contested on a single round-robin basis, with each team playing the other teams once for a total of 18 or 19 games. The additional match against a regional rival would not be played in this season. The top eight teams after the 19 rounds of each tournament qualified for the next stage.
• The second stage of each tournament had a knockout round contested by the top eight teams at the end of the first stage, with the top four teams being seeded for the quarter-finals and paired against a rival decided by draw. The quarter-finals were played under a format of double-legged series with the winners advancing to the semi-finals, which were also played over two legs.
• The finals in both tournaments were contested by the winners of each semi-final tie, playing a double-legged series for the championship.
• One team was relegated to Categoría Primera B at the end of the Torneo Apertura, being replaced in the Torneo Finalización by two teams promoted from the Primera B in order to return to 20 teams for the second half of the year. This was due to the decision of DIMAYOR's General Assembly to postpone relegation from the 2020 season to the end of the first semester of 2021, in order to ensure teams could be able to play the same amount of matches as originally scheduled before the onset of the COVID-19 pandemic and the temporary suspension of the previous season. At the end of the Torneo Finalización and the season, two teams were relegated to the second tier.

Teams

Stadia and locations

Team	Manager	City	Stadium	Capacity
Atlético Huila	Managerial changes ;Notes Torneo Apertura Knockout stage Quarter-finals First leg Second leg Semi-finals First leg Second leg Finals ---- ''Deportes Tolima won 3–2 on aggregate.'' Top scorers Source: Relegation A separate table is kept to determine the teams that are relegated to the Categoría Primera B for the next season. This table is elaborated from a sum of all first stage games played for the current season and the previous two seasons. For purposes of elaborating the table, promoted teams are given the same point and goal tallies as the team in the 18th position at the start of the season. Due to the postponement of promotion and relegation from the previous season to the end of the first semester of 2021 and the disaffiliation of Cúcuta Deportivo, one team was relegated to Primera B at the end of the Torneo Apertura. Team Relegation 1 Atlético Nacional 71 66 35 34 116 180 112 67 206 2 Deportes Tolima 72 64 37 30 116 159 98 61 203 3 Deportivo Cali 58 67 34 31 116 152 111 41 190 4 Junior 62 63 33 29 116 139 90 49 187 5 Millonarios 51 67 30 33 116 150 122 28 181 6 América de Cali 47 67 33 29 116 146 131 15 176 7 Santa Fe 56 46 40 33 116 145 99 46 175 8 69 59 20 26 116 162 135 27 174 9 Once Caldas 63 56 29 17 116 140 121 19 165 10 La Equidad 61 42 32 30 116 132 117 15 165 11 Atlético Bucaramanga 58 46 21 24 116 123 135 –12 149 12 Deportivo Pasto 35 54 34 23 116 115 118 –3 146 13 Águilas Doradas 57 40 31 14 116 121 143 –22 142 14 Envigado 46 47 23 17 116 121 143 –22 133 15 Patriotas 49 50 17 16 116 100 147 –47 132 16 Alianza Petrolera 42 55 19 6 116 112 166 –54 122 17 Jaguares 39 38 17 25 116 102 164 –62 119 18 Deportivo Pereira 39 38 18 18 116 93 161 –68 113 19 Boyacá Chicó 39 38 15 19 116 90 166 –76 111 Source: Rules for classification: 1st points; 2nd goal difference; 3rd goals scored; 4th away goals scored. Torneo Finalización Semi-finals The eight teams that advanced to the semi-finals were drawn into two groups of four teams, with the top two teams of the first stage being seeded in each group. The group winners advanced to the finals. Finals ---- ''Deportivo Cali won 3–2 on aggregate.'' Top scorers Source: Relegation The bottom two teams of the relegation table were relegated to Categoría Primera B for the 2022 season at the end of the Torneo Finalización, with this table taking into consideration the six most recent tournaments. For purposes of elaborating the table, Atlético Huila and Deportes Quindío, who were promoted from Primera B at the end of the first half of the season, were given the same point and goal tallies as the team in the 18th position at the start of the Finalización tournament. Team Relegation 1 Atlético Nacional 30 66 35 76 117 189 115 74 207 2 Deportes Tolima 39 64 37 66 117 162 97 65 206 3 Deportivo Cali 29 67 34 62 117 153 115 38 192 4 Millonarios 25 67 30 69 117 167 127 40 191 5 Junior 32 63 33 62 117 145 95 50 190 6 América de Cali 25 67 33 58 117 149 119 30 183 7 Santa Fe 31 46 40 58 117 146 102 44 175 8 34 59 20 52 117 144 127 17 165 9 La Equidad 36 42 32 55 117 133 122 11 165 10 Once Caldas 36 56 29 37 117 132 125 7 158 11 Atlético Bucaramanga 35 46 21 51 117 127 140 –13 153 12 Deportivo Pasto 15 54 34 39 117 113 127 –14 142 13 Águilas Doradas 32 40 31 39 117 127 146 –19 142 14 Envigado 20 47 23 44 117 126 147 –21 134 15 Alianza Petrolera 19 55 19 37 117 115 158 –43 127 16 Patriotas 20 50 17 35 117 97 150 –53 122 17 Jaguares 14 38 17 53 117 109 167 –58 121 18 Deportivo Pereira 14 38 18 51 117 101 159 –58 121 19 Deportes Quindío ' 14 38 18 40 117 95 162 –67 110 20 Atlético Huila ' 14 38 18 28 117 89 172 –83 98 Source: Rules for classification: 1st points; 2nd goal difference; 3rd goals scored; 4th away goals scored. Aggregate table The aggregate table includes the results of teams in all stages in the Torneo Apertura and Torneo Finalización, and awards one berth to the Copa Libertadores and three berths to the Copa Sudamericana. As an exceptional measure for this season, and due to promotion and relegation being implemented halfway into the season, the two teams promoted for the Torneo Finalización entered with the same matches, points, and goals as the team in 19th place in this table at the end of the Apertura tournament.