Cheltenham Town provide the opposition as John Mousinho aims to build on a solid start as boss.
After starting with a preferred 4-3-3 formation, the Blues head coach has switched to a 4-2-3-1 in the past two games.
How he goes about tackling the Robins, who play with a back three will be interesting, as will the players employed.
Here’s how we think Pompey will line up.
5. CB - Ryley Towler
Had a ropey moment at Lincoln missing a routine ball through the middle, but is still massively in credit after a strong start at Pompey. Photo: Jason Brown
6. LB - Connor Ogilvie
Denver Hume is finding it hard to displace the super dependable Ogilvie and looks nailed on to continue. Photo: Jason Brown
7. CM - Joe Morrell
What a revelation Morrell has been since his World Cup return. If it's a switch back to a 4-3-3 formation there's every chance he'll be handed a sitting role in midfield. Photo: Jason Brown
8. CM - Ryan Tunnicliffe
The unlikely revival continues. Was on the bench against Burton after featuring heavily under Mousinho. Back in the side at Lincoln and could well continue in a midfield three. Photo: Jason Brown