How does Champions League draw work?
The new-look Champions League draw will be held on Thursday from 17:00 BST and you can watch it live on the BBC Sport website.
Teams will discover which eight clubs they will meet (four at home and four away) - but no actual groups will be drawn.
All the teams will be in one 36-team league phase, as compared to the past format of eight four-team groups.
So how will the draw work?
Teams will be placed in four pots according to their seeding. Each team face two teams from each pot, one at home and one away.
A team will be drawn out of a pot and then Uefa's software will decide their eight opponents - and whether they will be at home or away.
It means more matches between the biggest teams. For example, Manchester City could face Real Madrid, Bayern Munich and Barcelona.
The software stops teams playing rivals from their own country - and means each team can only play two clubs from any one country.
Uefa says the computer system plans ahead so will ensure no teams further down the line get drawn against teams they cannot face.
How does the new format work?
Teams who finish in the top eight will qualify automatically for the last 16, while those who place ninth to 24th will compete in a two-legged knockout play-off for the chance to join them.
Whoever finishes 25th or lower will be eliminated and will not be entered into the Europa League.
From the last 16 onwards, the Champions League will continue to follow its existing format with the final taking place at a neutral venue - Munich this year.
The number of matches in the new format will increase from 125 to 189.
Each team will play a minimum of eight - instead of six - and a maximum of 17.
The league phase will now run until the end of January instead of ending before Christmas.
Find out more about the draw and how you can watch it live on the BBC here