Paul Cook believes a two-pronged Pompey attack could create more problems than it solves.
The Blues boss has heard calls in recent weeks for a switch from his preferred 4-2-3-1 system to accommodate a second striker after coming up against some stubborn defences at Fratton Park this term.
But although the argument is based on adding an extra attacking threat, Cook feels it could make his side more vulnerable at the back as he plots an overdue League Two home victory in Sunday’s clash with AFC Wimbledon.
Cook said: ‘I’m not stubborn to the point where it goes too far.
‘I desperately want to win at home as much as everyone else.
‘But I also desperately don’t want to get beaten.
‘I know what putting two up front does to a team – I’ve seen it. It can lead to other problems.
‘As a team, we’re not built like that. It’s always a trade off.
‘I like to play good, attacking football from a solid foundation.
‘Sometimes, you fix one issue and another one comes along in its place.’
And Cook insists fine-tuning is the way to go, rather than going back to the drawing board.
He said: ‘I think we are still a team where we can get better at what we are trying to do, rather than ripping anything up.
‘Why would we want to do that?
‘One thing I don’t understand sometimes is the impatience of the game – maybe that’s something I have got to learn.’
n Ticket details for the club’s FA Cup second round home clash with Accrington Stanley are expected to be announced today.
The tie will be played over the weekend of December 4-7.