Dave Jones has reiterated the importance of his side upping the ante in defence following the home defeat to Huddersfield on Wednesday night.
The 3-1 reverse was the third straight loss for the Owls, who must pick themselves up ahead of another clash in S6 on Saturday against Bolton.
And Jones says the work will start from the top as Wednesday bid to climb out of their current slump.
He said: “We are still making basic errors at the back and they are costing us games. We just cannot defend at the moment and that has to change.
“The frustrating thing is that yesterday I saw the best training session I have seen at this football club so far.
“But you can’t leave it on the training ground, you have to turn up to the party and we didn’t do that tonight.”
Jones concurred with the two red cards shown by referee Graham Salisbury, firstly to Huddersfield’s Joel Lynch and then Wednesday’s Joe Mattock.
He said: “You can see why both lads have been sent off. Antonio beat his man and the lad knew what he was doing when he brought him down.
“With Joe, I don’t think the first one was a yellow card but that doesn’t matter because you don’t then go and pick up what was a certain booking.
“We lost our advantage at that point.”
The Owls’ boss closed by explaining the decision to install Martin Taylor as captain in place of Jose Semedo.
He said: “Jose didn’t really want it and he was fine with the decision when we spoke about it.
“He likes to concentrate on his game and I think he found himself doing things like arguing with the referee because he felt he had to being skipper.
“Martin has done it before, he has plenty of experience as captain and it’s a natural fit.”