2020–21 UEFA Champions League
On 24 September 2020, UEFA announced that five substitutions would be permitted from the group stage onward, with a sixth allowed in extra time. However, each team is only given three opportunities to make substitutions during matches, with a fourth opportunity in extra time, excluding substitutions made at half-time, before the start of extra time and at half-time in extra time. Consequently, a maximum of twelve players can be listed on the substitute bench.