We are midway through the Champions League group stages for the 2020-21 campaign and there are plenty of talking points as we enter into more midweek action.
Premier League clubs Manchester United and Chelsea could take huge steps towards the knockout stages as Liverpool continue to deal with their injury crisis, whilst reigning champions Bayern Munich could re-write the history books and Barcelona will have a rather noticeable absentee.
Here, Sportsmail looks at 10 talking points ahead of this week's Champions League action.
Messi missing for Barcelona
Lionel Messi has been left out of the Barcelona squad to face Dynamo Kiev on Tuesday after one of his worst performances for the club in Saturday's defeat by Atletico Madrid.