Danny Wilson is prepared for some tough training ground sessions after seeing his Barnsley side conced five goals at Oakwell.
Barnsley started off well, but were ripped apart as the visitors cruised into a 5-0 lead.
Only a late spurt from the Reds avoided total humiliation, with Conor Hourihane netting twice and Devante Cole scoring.
“Being 5-0 down was a conundrum as to why in terms of our defensive work, because we’re better than that,” said Wilson.
“The four or five mistakes we’ve made - we’ve been punished for. At the same time you’ve got to hold your hand up to the good finishing that they produced and they’re a good side.
“I think after 20-25 minutes, we more than matched them and should possibly have been in the lead on a couple of occasions.
“Because we don’t score at certain times, it shouldn’t make us vulnerable at the back.
“The second goal just on half time was a real blow, really. Other than that we can see what we can work on quite blatantly.
“The defending at times wasn’t tight enough and the ball retention up front wasn’t good enough. There are things we can put right, there’s no doubt about it.
“Collectively we’ve got to look at what we can do better as a team. Individual mistakes happen but they shouldn’t always cost you.
“If you get a result like this in the season and it makes you better, we’ll take it. We’ve got to take this on the chin. We’ll learn from it
“There’s no throwing of tea cups because this is a learning process.”
Dons surged into a 5-0 lead thanks to goals from Benik Afobe, Samir Carruthers, Dele Alli, Will Grigg and Ben Reeves.