Such has been the diverging fortunes of these two clubs for so long now, that when someone asks me what these south coast derbies are like, I have to really think hard to remember.
The League Cup tie six years ago when there was two leagues between them was a shoo-in for Saints.
Although fans would have revelled in the win, it was a million miles from how both sets of supporters will feel now the derby is back as a level-playing field, home and away, a proper match-up this season.
And going back 13 years to the last league meetings it felt like Pompey enjoyed the moral high ground despite two draws.