It wasn't, but there are clear statistical anomalies when you look at certain data:
tackles made: City 515, pool 550
Fouls given: City361, pool 331
Tackles per foul: City 1.42, pool 1.66
Yellow cards: city 60, pool 38
Fouls per card: City 6.02, pool 8.71.
Fouls per card (for the opposition team): city 6.85, pool 5.89
City committed less tackles, but got more Fouls.
Although City and Liverpool have the roughly same tackles to fouls ratio, City were almost twice as likely to be yellow carded.
The opposition had to commit more Fouls against city to get a card.
Can't find any data on opposition tackles to fouls, but I'd be surprised if Liverpools clear advantage wasn't continued!