Pep Guardiola told Manchester United fans they should be 'ashamed' for targeting Phil Foden with abusive chants about his mother at Old Trafford on Sunday.
Foden came under fire during a lame Manchester derby that ended goalless, with City understood to be shocked and disgusted by how many United fans were involved.
'It's a lack of class,' said Guardiola afterwards. 'But it's not United, it's the people, you know? We are so exposed, people who are on the screen in world football: managers, owners, and football players especially.
'Honestly, I don't understand the mind of the people involving the mum of Phil.