Wigan manager Roberto Martinez claims his team have been their own worst enemies this season.
The Latics have a chance to secure a morale-boosting victory against npower Championship side Preston in the Carling Cup on Wednesday but Martinez says it matters little who the opponents are if they continue to beat themselves.
Wigan have improved since conceding 10 goals in their opening two Barclays Premier League games but were undone by a series of defensive blunders in losing 2-0 to Manchester City on Sunday.
"We are playing against ourselves," said Martinez. "It doesn't matter who the opposition are, if we don't do the things right we are going to get punished.
"When we put it together and show what we can do we can compete against anyone, as the 1-0 win at Tottenham showed.
"It is about learning from that and making sure we develop together - we want to get rid of that feeling we were left with on Sunday and we need to stop conceding silly goals because that hides all the good work we have done in many other areas."