With two yellow cards, Jude Bellingham, Aurelien Tchouameni, Eduardo Camavinga, Luka Modric, Endrick and Antonio Rudiger are the Real Madrid players in immediate danger as they need to avoid a booking against Man City to avoid being suspended for a potential Champions League round of 16 first-leg.
All yellow cards and suspensions are wiped after 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.
In fact, Ancelotti will need to have a word with a few of his players, urging them to tread carefully in the second leg, whilst also staying calm himself as he is one yellow card away from a touchline ban.
In the Champions League, a player must receive three yellow cards, of which none result in a red card, to be suspended.
The two European giants met in the Champions League for a fourth consecutive season last week as the current holders emerged victorious in an highly entertaining knockout phase playoff first-leg.
