The Blues boss explained he’s determined to put right his team’s poor away form and lack of goals which is hampering their promotion bid.
Jackett’s side fell to a disappointing 2-0 loss at their promotion rivals in a reverse where they failed to significantly threaten Darren Ferguson’s side.
The result was the third away defeat on bounce for Pompey - in games where they’ve found to find the back of the net.
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Jackett explained those statistics are a huge frustration for both him and his team.
He said: ‘It’s a few games we haven’t scored away from home - and that’s the biggest disappointment.
‘Those combinations which are usually a feature of our play wasn’t there.
‘We’re not doing enough going forward as a team.
‘We weren’t cohesive enough and able to produce our usual game of getting it to wide areas and then getting good deliveries and people into the box. It’s a frustration
‘There’s a pattern developing now with today, Fleetwood and Coventry away where we haven’t scored.
‘We need to be able to affect that and put those things right. We’re capable of that.’
Pompey were given the runaround by League One’s leading scorer Ivan Toney and tormented by the pace and trickery of Sikiri Dembele as they dropped to sixth in the table.
The Blues’ attacking players were found wanting in comparison - a reality which wasn’t lost on their manager.
Jackett added: ‘The second goal summed it up. We’re going forward, they’ve cleared it and Toney’s pulled it out of the air and stuck it over my keeper. It was the sort of moment we couldn’t find.
‘We just couldn’t find the final play, pass or player who could beat his man and hurt them.’