Stand-in skipper Nicky Shorey blasted Pompey’s carelessness following a third straight league defeat.
A 2-0 loss at Southend on Saturday has prompted more concern over the direction the Blues’ season is heading.
An alarming characteristic in a poor match was how Andy Awford’s side repeatedly failed to retain possession.
That failure was also pinpointed by Shorey during his assessment of Pompey’s latest set-back.
And the man wearing the armband in the absence of both Ben Chorley and Johnny Ertl, has demanded the issue is resolved if the Blues are to begin climbing the table once again.
He said: ‘To be honest, I felt it was a pretty even game until they nicked a goal from a set-piece to be honest.
‘I don’t think there was a lot in it really.
‘The main disappointing thing for us was our possession. If we want to do well this season we have got to keep possession a hell of a lot better than that.
‘When we did keep the ball, got in behind, used it simple and passed it well we got chances – we just didn’t do it enough.
‘That’s the thing, you cannot get up the pitch as a team and squeeze up and get the ball away from your defensive players if you are conceding possession at silly times like that.
‘It’s something we need to look at and need to do better. It’s just general common sense in football, you give one away you make sure you keep the next one and that is what we need to do.
‘Giving the ball away once, then twice, then three times, then four times – that’s not good enough.
‘Sometimes you are going to have games when it happens, but it is happening a bit too much for our liking and we need to take a bit more care with it.’
Barry Corr opened the scoring from close range in the 56th minute following a corner.
Substitute Shaquile Coulthirst sealed the scoreline with a breakaway goal after 90 minutes.
That was the difference in generally an even match during which both sides failed to impress.
Not that it will concern Southend, who picked up a first win in six matches.
Although Shorey believes the result was closer than the scoreline suggest.
Shorey added: ‘I think the scoreline looks worse than it was.
‘Both teams battled away, then they nicked the first goal and we got a bit anxious in trying to get a goal back and they caught us on the break.
‘It was a tight game, if we had marked better from a set-piece it probably ends up 0-0.
‘Then we have tried to push forward and they have got a second on the counter.
‘You can take that one lightly really, it was irrelevant.
‘I know it was a 2-0 defeat away from home but it was a pretty even game.’