Officiating in the Champions League has often been stricter than that in Europe's domestic leagues.
Yellow and red cards are seemingly far more common as refereeing discretion is often replaced with the stern implementation of the law at all times. This results in a lot more players picking up suspensions, with UEFA rules differing from those in domestic leagues.
Here is the full record of bookings, red cards and suspensions in the 2023/24 Champions League campaign.
Yellow card, red card and suspension rules explained
In the Champions League, a player must receive three yellow cards, of which none led to a red card, to be suspended. This suspension lasts for one match, the same amount of time as any individual red card, although UEFA can extend a ban for a red card offence in extraordinary circumstances.
After receiving three yellow cards, "any subsequent odd-numbered caution" (fifth, seventh, ninth etc.) will result in another suspension.
All yellow cards and suspensions are wiped at the quarter-final stage, meaning a player could only miss the Champions League final in the rare event that they were sent off in the semi-final second leg.
Arsenal
Atletico Madrid
Barcelona
Bayern Munich
Benfica
- Suspended: Antonio Silva (Inter vs Benfica - 03/10/23)
Borussia Dortmund
Braga
Celtic
- Suspended: Gustaf Lagerbielke (Celtic vs Lazio - 04/10/23)
- Suspended: Odin Thiago Holm (Celtic vs Lazio - 04/10/23)
Copenhagen
- Suspended: Elias Jelert (Copenhagen vs Bayern Munich - 03/10/23)
Feyenoord
Galatasaray
Inter
Lazio
Lens
Manchester City
Manchester United
Milan
Napoli
Newcastle United
Paris Saint-Germain
Porto
PSV Eindhoven
RB Leipzig
RB Salzburg
Real Madrid
Real Sociedad
Red Star
Royal Antwerp
Sevilla
Shakhtar Donetsk
Union Berlin
Young Boys
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This article was originally published on 90min as 2023/24 Champions League bookings, red cards and suspension list.