Kenny Jackett has demanded Pompey be more ruthless in front of goal.
The Blues were held to a 1-1 draw at Accrington last weekend but had opportunities to put the game to bed in the first half.
The visitors dominated the opening 30 minutes, yet couldn’t put their chances away.
Pompey travel to basement-side Bradford on Saturday bidding for a first victory in three games.
Jackett has had his players working on their finishing in training this week.
And the manager wants the Blues to be more clinical against the struggling Bantams.
He said: ‘We do need to be more ruthless, hit the target and get more players following up.
‘It’s something we have worked on this week, definitely, and something that we’ve talked about.
‘We’re all disappointed when defenders make mistakes.
‘But when we all miss easy chances, pass up very good situations and don’t make good decisions, we want to all be working towards being clinical because all good teams are.
‘It was one of those things. It’s something we’ve looked at and talked about this week.
‘When we have our spells and get into good positions then we need to be putting pressure on ourselves to make the right decisions, select the right technique and finishing with a clinical nature.
‘We’ve been talking about it and working at it, 100 per cent.’