Younes Kaboul says Portsmouth's defending must improve if they're to drag themselves away from the dropzone.
Pompey gave away three shocking goals from set-pieces at Ewood Park last weekend.
He told The News: "We had a bad result at Blackburn when we started well.
"In the first half the game was under control. But in the second half they put us under a lot of pressure. Again, there were goals from set-pieces. It's happened a lot since the start of the season.
"We have to be more concentrated than we were and defend better. Otherwise we have to look forward because we are playing mainly well.
"When you lose you want to play just after to put it right. We have to wait and work in training and look ahead to Stoke to get the three points."