Champions League knockout games are set to be played in an 12-day condensed tournament in Lisbon in August.
The Portuguese capital will host the quarter-finals, semi-finals and final between August 12-23.
All ties will be played as single legs across two different stadiums in Lisbon - the Estadio da Luz and the Estadio Jose Alvalade.
UEFA's Executive Committee are expected to approve the new mini tournament at a meeting on Wednesday.
- Champions League quarter-finals: August 12-15
- Champions League semi-finals: August 18/19
- Champions League final: August 23
How the four outstanding last-16 matches should be completed has yet to be decided. Manchester City were due to play a second-leg match against Real Madrid on March 17 at the Etihad Stadium, leading 2-1 from the first leg in Spain. Chelsea are 3-0 down from the home first leg of their tie against Bayern Munich.
Original Champions League final hosts Istanbul are expected to be compensated with the right to stage a future final.
As things stand all the matches would be behind closed doors, but if the Portuguese government were to alter its guidance in time for ticketing to be organised then there is the possibility of some supporters being able to attend.
Champions League last-16 ties still to play
Manchester City vs Real Madrid (2-1 after first leg)
Bayern Munich vs Chelsea (3-0)
Juventus vs Lyon (0-1)
Barcelona vs Napoli (1-1)
Already through: Paris Saint-Germain, Atalanta, Atletico Madrid, RB Leipzig
A decision has yet to be made on the remaining Europa League games this season but it's likely to follow a similar format with the likely destination a city in Germany - possibly Frankfurt or Dusseldorf.
The Women's Champions League may also follow a similar pattern, with reports in Spain suggesting the final games could be split between the Basque cities of Bilbao and San Sebastian.
Europa League last-16 ties still to play
FC Copenhagen vs Istanbul Basaksehir (0-1)
Wolves vs Olympiacos (1-1)
Bayer Leverkusen vs Rangers (3-1)
Shaktar Donetsk vs Wolfsburg (2-1)
Inter Milan vs Getafe (Both legs yet to be played)
Sevilla vs Roma (Both legs yet to be played)
FC Basel vs Eintracht Frankfurt (3-0)
Manchester United vs LASK (5-0)
UEFA is understood to be targeting a mid-October start for the group stages of the 2020-21 Champions League, traditionally when you would expect matchday three to start.
But how it reaches that point - and when the qualifying rounds take place - is an extremely complex problem to solve with many leagues likely to still be ongoing when the preliminaries are usually scheduled.