2021 Malaysia Cup group stage

The 2021 Malaysia Cup group stage began on 25 September and ended on 10 November 2021. A total of 16 teams competed in the group stage to decide the 8 places in the knockout stage of the 2021 Malaysia Cup.

Draw
The draw for the group stage was held on 15 September 2021, 14:00 MYT (UTC+8), at the Bukit Jalil, in Kuala Lumpur.

The 16 teams were drawn into four groups of four. For the draw, the teams were seeded into four pots based on the following principles.
 * Pot 1 contained the Super League winners, and another three teams at the top four based on league positions. Pot 1 includes the top 4 teams from the Super League.
 * Pot 2 with those place 5th to 8th from the Super League.
 * Pot 3 with those placed 9th to 11th from Super League, together with the 1st placed team from the Premier League.
 * Pot 4 with those placed 2th to 5th from Premier League.

The schedule of each matchday is as follows:

Teams
Below are the participating teams grouped by their seeding pot. They include:
 * Top 11 teams from the Super League and Top 5 teams from Premier League which enter in this stage.

Format
In each group, teams played against each other home-and-away in a round-robin format. The group winners and runners-up advanced to the quarter-finals.

Tiebreakers
 Teams were ranked according to points (3 points for a win, 1 point for a draw, 0 points for a loss), and if tied on points, the following tiebreaking criteria were applied, in the order given, to determine the rankings.
 * 1) Points in head-to-head matches among tied teams;
 * 2) Goal difference in head-to-head matches among tied teams;
 * 3) Goals scored in head-to-head matches among tied teams;
 * 4) Away goals scored in head-to-head matches among tied teams;
 * 5) If more than two teams were tied, and after applying all head-to-head criteria above, a subset of teams were still tied, all head-to-head criteria above was reapplied exclusively to this subset of teams;
 * 6) Goal difference in all group matches;
 * 7) Goals scored in all group matches;
 * 8) Away goals scored in all group matches;
 * 9) Wins in all group matches;
 * 10) Away wins in all group matches;
 * 11) Disciplinary points (red card = 3 points, yellow card = 1 point, expulsion for two yellow cards in one match = 3 points);

Groups
The matchdays were 26–27 September, 29 September– 1 October, 29–30 October, 1–3 November, 6–7 November, and 9–10 November 2021. All times are on Malaysia Standard Time (UTC+8).