Di Canio launched an incredible attack on his keeper Foderingham after substituting him just 21 minutes into the game.
The Swindon stopper headed for the tunnel but not before the 21-year-old had kicked a water bottle on to the pitch in anger.
Boss Di Canio said: “He is one of the worst players I have ever seen. There was no reason why I could not change him for a substitute.
“He was the worst player against Stoke in midweek but we won that game 4-3.
“Any player can make a mistake but it was his arrogance and ignorance that was the worst I have seen from a professional.
“Not as a person but as an athlete. If he does not say sorry to the fans, he will be out of my team. I don’t mind, these are my rules.
“Maybe he behaved like this because the window has closed. But an emergency loan is possible and I’m ready to bring in a goalkeeper.”