"It was a clear red, it's as simple as that," said Foy to the Daily Mail.
Neither referee Michael Oliver nor VAR David Coote had deemed Lo Celso's horror challenge worthy of punishment, the argument from the VAR being that the Tottenham midfielder had nowhere else to put his foot.
"I can only assume that David thought Lo Celso had no other place to put his foot," said Foy. "In that case he would not have advised Michael Oliver to go to the screen because it was not an act of serious foul play. That was a misjudgement by David Coote.
"The referee can still go to the screen but remember that he hadn't even given a foul, he'd given a throw-in. So, when David Coote tells him it's not serious foul play, Michael wouldn't have felt compelled to take another look. In hindsight, he should have gone to have a look. Basically it's human error. It was a clear red."