Preston boss Graham Westley has labelled Notts County winger Jamal Campbell-Ryce's tackle on Scott Laird as "disgusting".
County substitute Campbell-Ryce saw red in the dying stages of a drab 0-0 draw at Deepdale in League One on Tuesday night, after a tackle that led to Laird being taken away in an ambulance.
Preston had the better of the match and Nicky Wroe twice forced County goalkeeper Bartosz Bialkowski into smart saves, while Stuart Beavon saw his effort cleared off the line by Gary Liddle.
Westley said: "I thought it was disgusting, it was obscene, no language is strong enough.
"There was absolutely no intent, in my opinion, other than to be totally reckless and put someone in serious danger.
"He offered me an apology but the boy's lying in hospital. It's not my apology to accept."