Sir Alex Ferguson has rejected criticism from Owen Coyle following Nemanja Vidic's clash with Johan Elmander on Saturday.
Bolton boss Coyle claimed the Serbia centre-back had committed a 'terrible tackle' on striker Elmander during the Red Devils' 4-0 victory at the Reebok Stadium on Saturday evening.
The Football Association will not take any action against Vidic over the incident, which left Sweden international Elmander needing five stitches in a head wound.
Coyle felt the incident was deliberate, but Ferguson was quick to defend his man against the Trotters boss.
"What is the old saying about people in glass houses?" he responded.
"When Nemanja Vidic came off at half-time he had a lump on his head the size of an egg, his cheek was swollen and he had a black eye."
It had already been suggested Vidic would not face an FA charge because referee Martin Atkinson had a clear view and was looking directly at the incident.
That has proved to be the case, not that Ferguson had any fears about a player he felt produced the best central defensive performance in the world at the weekend.
"I didn't see them all but I know it was," said the Scot.
"It was the best central defensive performance I have seen for years.
"I would have been amazed if the FA had charged him because clearly, his eyes were on the ball.
"There was no intent there whatsoever. I don't think he knew an opponent was there or who it was."