2021–22 UEFA Champions League group stage
On each matchday, one set of four groups played their matches on Tuesday, while the other set of four groups played their matches on Wednesday, with the two sets of groups alternating between each matchday. The fixtures were decided after the draw, using a computer draw not shown to public. Each team would not play more than two home matches or two away matches in a row, and would play one home match and one away match on the first and last matchdays (Regulations Article 16.02). This arrangement was different from previous seasons, where the same two teams would play at home on the first and last matchdays.