| Date | Stage |
| 17 July | Preliminary round draw, Nyon |
| 8/9/10/11 August | Preliminary round |
| 9 August | First qualifying round draw, Nyon |
| 10 August | Second qualifying round draw, Nyon |
| 18/19 August | First qualifying round |
| 25/26 August | Second qualifying round |
| 31 August | Third qualifying round draw, Nyon |
| 1 September | Play-off draw, Nyon |
| 15/16 September | Third qualifying round |
| 22-30 September | Play-offs |
| 1 October | Group stage draw, RTS studios, Geneva, Switzerland |
| 20/21 October | Group stage, Matchday 1 |
| 27/28 October | Group stage, Matchday 2 |
| 3/4 November | Group stage, Matchday 3 |
| 24/25 November | Group stage, Matchday 4 |
| 1/2 December | Group stage, Matchday 5 |
| 8/9 December | Group stage, Matchday 6 |
| 14 December | Round of 16 draw, Nyon |
| 16/17/23/24 February | Round of 16, first leg |
| 9/10/16/17 March | Round of 16, second leg |
| 19 March | Quarter-final and semi-final draws, Nyon |
| 6/7 April | Quarter-finals, first leg |
| 13/14 April | Quarter-finals, second leg |
| 27/28 April | Semi-finals, first leg |
| 4/5 May | Semi-finals, second leg |
| 29 May | Final – Atatürk Olympic Stadium |
The draw for the group stages, with eight groups of four, was held on October 1. Each team plays the other three teams in its group, home and away, on the following dates, and then the top two in each group go on to the knockout round.
These are all Tuesdays and Wednesdays, with teams alternating home and away each week.
October 20-21
October 27-28
November 3-4
November 24-25
December 1-2
December 8-9
| Date | Team 1 | Versus | Team 2 |
| October 21 | Paris Saint Germain | vs | Manchester United |
| October 22 | Bayern Munich | vs | Atletico Madrid |
| October 29 | Juventus | vs | Barcelona |
| Date | Team 1 | Versus | Team 2 |
| November 4 | Salzburg | vs | Bayern Munich |
| November 5 | Leipzig | vs | Paris Saint Germain |
| Date | Team 1 | Versus | Team 2 |
| December 2 | Atletico Madrid | vs | Bayern Munich |
| December 3 | Manchester United | vs | Paris Saint Germain |
| December 9 | Barcelona | Vs | Juventus |
The draw will be held on December 14, and teams will play home-and-away to advance.
February 16-17
February 23-24
March 9-10
March 16-17
The draw for the quarterfinals, semifinals and final will be held on March 19. Teams will play home-and-away to advance through the quarters and semis.
April 6-7
April 13-14
April 27-28
May 4-5
May 29, 2021 in Istanbul, Turkey
