Guy Whittingham rued the ‘unforgiveable’ defending which cost Pompey at Walsall.
The Blues made it 14 games without a win as they went down to a 2-0 loss at Banks’s Stadium.
It was nightmare defending in the first half which made all the difference.
Mustapha Dumbuya found himself at the centre of affairs with both goals. Will Grigg outleaped Adam Webster for the opener, with Febien Brandy easily beating Dumbuya for the finish.
The full-back then played Brandy onside in the build-up to Grigg’s second goal.
Whittingham knows those errors made all the difference.
He said: ‘The fans can see what’s happening.
‘It’s those two errors which have cost us – and it’s unforgivable.
‘It’s happening so regularly at the moment.
‘How do you get out of it? Well, you have to keep going. You have to keep reminding people to concentrate and do right things.
‘We have to work so hard to get a goal, so we can’t let it happen.’
Whittingham drew solace from the performance of veteran strikers Paul Benson and David Connolly who toiled away all night.
He said: ‘David Connolly had his first game in six months and worked his heart out.
‘It was the same with Paul Benson. If they keep working like that they will get a break.
‘They are both great characters, the type this football club needs at this moment in time.
‘You hope somewhere along the line the attitude David showed out there will rub off on other players.’