"I do not think the referee saw it," Risgard has claimed.
"Anywhere else but this place (Old Trafford) it would have been a red card.
"I have some big marks and I do not think it looks good on television.
"There was also another incident with Rooney where he threw an arm and hurt one of our players.
"But these challenges happen in football and he did come and apologise to me after the game."
United now face an anxious wait to see if UEFA take any action against the England international striker for these alleged incidents.