Dean Keates lamented his side’s second-half performance following the Saddlers’ 5-2 defeat to Bolton in the FA Cup third round.
An Andy Cook header put the visitors ahead at half-time but three goals in five minutes turned the match on its head.
A Mark Beevers own goal gave the Saddlers hope, but two further goals from Josh Magennis - completing the striker's hat-trick - handed the Trotters a resounding win.
“We spoke at half-time about starting bright [in the second half], as we did the first half," said Keates.
“From a corner, we didn’t get into our slots quick enough and it became too easy.
“We got a little bit shell-shocked and it’s something that needs to be addressed.
“In the first half we were outstanding. But in the second half we needed to regroup into our shape a lot quicker.
“We can’t make decisions like we are at the moment. We have to be compact, we have to be organised but players are switching off.
“We’ve got a full week’s training now and there are different bits that will have to be worked on.
“There are game reality situations where they’ve got to make better decisions.”