Ancelotti complained that City's intimidating midfield were allowed to apply too much pressure and made "dangerous" tackles. He also said Marriner must have "left his whistle at home".
The Italian said: "It was a physical game. One player against another player is not dangerous but there were times when one of my players suffered three fouls at the same time.
"When that happens he has to whistle. He couldn't whistle because he had left his whistle at home."