Gary Rowett reserved special praise for Patrick Agyemang after he felt his Burton Albion side were bullied by the Blues striker.
Agyemang turned in a typically powerful display as the lone forward with Ricky Holmes playing just off him.
And the Burton boss felt the former QPR man was the difference.
Rowett said: ‘If you look at Portsmouth’s front four, they are quite dangerous.
‘I think Agyemang played that lone target man role as well as I have seen anyone play it in this division.
‘He was a real handful and I thought he was the difference between the two teams.’
Rowett also pointed to a controversial moment in the build-up to Pompey’s second goal.
Holmes appeared to impede Burton defender Damien McCrory – an incident that he felt effectively killed the game for his side.
Rowett said: ‘For the second goal, I cannot understand for the life of me how it’s not a free-kick. It’s a blatant foul.
‘He might not have intended to foul him but it’s a foul.
‘From that, they scored the second goal and you can argue that the game is over then.
‘It’s a poor decision that has made the game difficult to win.’
But while he criticised the officials for failing to spot the foul, he was also critical of his own team’s performance.
Pompey controlled much of the game at the Pirelli Stadium.
Rowett said: ‘We’re not creating enough chances and we’re not getting the rub of the green at the moment.
‘But we needed to do more to win the game.
‘We have slipped into a period where we are not quite doing enough to win games.
‘We are not playing well enough and I accept that.
‘We didn’t show enough aggression in forward areas and I don’t think our quality on the ball was good enough.
‘It’s a disappointing result for us.’
– STEVE WILSON