Darren Moore was left to rue a first half red card that completely swung the balance of play as Wednesday went down 2-0 at Peterborough on Tuesday night.
Reece James was dismissed for a high challenged on Joe Ward just after the half hour mark and that decision changed the course of the game.
The Wednesday boss had no complaints over the dismissal and gave his reaction to a difficult night for the Owls in Cambridgeshire.
“It was a red card,” Moore said. “It changed the balance of the game.
“We were well in the game before the sending off. It changed the complexion because I thought we were on top, Peterborough looked nervous, we had a gameplan and I was pleased with how we started.
“But they had an extra man, made the most of it in wide areas and they got balls into the box.
“The sending off changed the course of the game.
“We saw 10 boys give their all for the club and tried to get back into the game but when you chase it, you are going to leave pockets.
“It's our first loss of the season but we have to regroup and look towards Saturday. We will analyse everything about tonight but the important thing is our reaction.
“Reece made a decision, it was the wrong decision and he has apologised to the boys in there. But we are all in it together and we will move forward together."
Moore made four changes this evening, with skipper Barry Bannan and Josh Windass amongst those named on the bench.
The gaffer explained: “Josh is coming back from a year off, having been injured.
“Barry Bannan, after the game on Saturday was struggling with illness and suffered heat exhaustion. He didn't train yesterday and then came back today so we didn’t want to risk him.”