Paul Cook has confirmed his preferred Pompey formation is not set in stone.
The Blues boss has stuck to his 4-2-3-1 set-up for every match so far and looks almost certain to go that way again at Luton Town in tomorrow’s League Two showdown.
But Cook also offered a glimpse of a potential three-man defence through necessity last weekend as Adam Webster replaced Ben Davies after Enda Stevens was sent off.
And he insists the formation will be under constant review, even though he thinks too much is made of a tactical set-up.
Cook said: ‘I honestly believe far too much is made of formations these days.
‘In my opinion, formations and tactics are so overrated.
‘But I think people can see if we did go to three centre-backs in Adam Webster, Christian Burgess and Matt Clarke that we have a natural three.
‘It’s something we will look at.
‘It’s not the case where we have decided “we will play this way and that will be the end of it”.
‘It’s all there to be tinkered with.
‘We want to win football matches like everyone else.’
Cook felt his side had looked defensively secure in recent weeks – until the first-half horror show against Morecambe that left Pompey 3-0 down.
‘There is always a balance in what you are trying to do,’ he said.
‘The hardest part is to get it right both ways – attacking and defending.
‘Going into Saturday’s game, we felt defensively, we were sound.
‘At half-time, we certainly didn’t think that.
‘But in the modern game, the clamour for change is just so instant.
‘We’ve got to relax a little bit and give things a chance.’