Opta highlighted the Brazilian's contribution afterwards, applauding the number of tackles he made as United gained the upper hand and tried to grab a winner as the second half wore on.
Two biting challenges within the space of a few seconds, with four minutes of normal time remaining, were a great example of his desire to secure the three points on derby day.
11 - Casemiro made 11 tackles against Manchester City today, the joint-most by a Manchester United player on record (from 2006-07) in a Premier League game, along with Owen Hargreaves v Liverpool in December 2007 and Patrice Evra v Portsmouth in August 2008.