Stuart Gray is bemoaning the loss of two points at 10-man Forest after the Owls had been in control at the City Ground before only drawing 3-3.
Wednesday had led 3-1 and were 3-2 up when home defender Danny Collins was sent off in the 79th minute.
But an 87th minute free kick by Jamie Paterson crowned a Forest fightback - with Gray feeling that a lack of experience in his team meant that they failed to make proper use of the extra man.
“We were in control and looked capable of scoring at will - I’m disappointed we were done on two crosses, two headers at the back post,” he said.
“Then deja vu with the free kick (Forest’s third goal) - we had one at Leicester the other night so we’re giving the opposition the chance of a free shot on our goal.
“We had tired minds at the end, and the reason why is we had far too many players running with the ball instead of just passing it and picking the 10 men off.
“I probably just needed a bit more experience on the pitch; Loovens and Guchi could probably have just pulled people in and said ‘hey, get back to the basics.’
“If you’d said to me before the game we’d get three goals, I’d have thought we would win, because I saw Forest play Millwall on Saturday - they looked short of confidence.
“The way we started, you could see the anxiety creep into the Forest side.
“We got our noses in front. To get the second goal just before half time gave us that lift.
“When we’d got the third goal, it was just a case of manage the game and see it out.”