He made his players sit through the dvd of the Preston game and hopes lessons have been learned after they let slip a 4-1 lead to lose 6-4 at Elland Road.
Grayson said: "We looked at all the things that went wrong. We had our say and the players had their input, but what's gone has gone and we have to draw a line under it now.
"It wasn't pleasant watching it either and as I said on the night, the fans deserved far better than what they saw, but we have another game on Saturday and that's what we're thinking about now.
"I know it's said a lot, but the one beauty of this league is that you have another game swiftly and we're concentrating on going to Ipswich now and picking up a result there.
"The players responded after we got done at Barnsley and I expect them to respond again. It'll be another tough test at Ipswich, but one we're looking forward to."
Source: PA
Source: PA