Mark Clattenburg revealed the unusual way he persuaded Jordan Henderson to stop abusing him during a match - by threatening to tell his mum.
Speaking on the Mail's Whistleblowers podcast, the former Premier League referee described the incident during a debate over whether players should be sent off more often for swearing at referees.
He used the Henderson anecdote to argue that understanding individual psychology can be more effective than issuing red cards that could change the course of a match.
Clattenburg said: 'Jordan's from Sunderland and his mum and dad are from a village close to where my old house was.