Nottingham Forest manager Steve Cotterill says his side must not panic about the heavy defeat at Portsmouth.
Forest had won three games out of four under Cotterill before Saturday's 3-0 loss against his former club.
He told BBC Radio Nottingham: "How on earth did we lose 3-0? We've dominated and lost 3-0. I'm lost for words.
"We don't want to get too wrapped up with the result. We understand the scoreline and it hurts, but the performance was good."
Despite picking up more wins in five games than the Reds managed in their first 11 games of the season, Cotterill's men remain just four points above the Championship relegation zone.
But he remains upbeat about the progress they are making.
"We've been the better side. Unfortunately the scoreline will mask it but it was a good performance from our lads," he said.
"I'm really pleased with the effort and application of the players. They have been first class.
"We've gone to sleep on a couple of things. We're bitterly disappointed with the goals we've conceded but not the performance.
"When you are so dominant in a game you have to make sure your concentration stays really on the button. You have to keep the back door closed.
"That would be the only thing I would say, most of the game was played in their half."