Manchester United legend Gary Neville says Birmingham City deserve a points deduction after an ugly pitch invader incident on Sunday.
A fan ran onto the St Andrew's pitch in the ninth minute and appeared to strike Aston Villa playmaker Grealish from behind.
Neville wrote on Twitter: “The club are going have to take a huge punishment for this to act as a deterrent in the future.
“A points deduction or Empty stadium for 10 games!"
West Midland Police confirmed a suspect was arrested after the incident.