Paul Cook spoke of his disappointment after seeing Pompey draw 1-1 at Mansfield but admitted: The buck stops with me.
The Blues paid the price for a missed early penalty from Marc McNulty as they fell behind to Matt Green’s first-half opener.
They were level on the stroke of half-time, though, when luckless Stags defender Ryan Tafazolli bundled over his own line from a Ben Davies corner.
Neither side came close to winning the game in an uneventful second half as Cook was left to reflect on a missed opportunity in the race for automatic promotion.
Pompey could have moved within three points of the top three with a win but are instead five points off the pace in sixth place.
Cook said: ‘It’s not the disappointment of the point it’s the disappointment of where we feel we might end up.
‘When we take a point away from home we can’t be too down.
‘But there is so much more in us as a team than what we are seeing.
‘And it is my job as manager - the buck stops with me.
‘My job is to make sure I try to turn it around and get it right.’