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.
9. CM - Paddy Lane
Not set the world alight when being used centrally so far, but the suspicion is that's where he'll be favoured under Mousinho. Photo: Jason Brown
10. LW - Ronan Curtis
Man of the match but injured against Fleetwood. Made his sub return at Lincoln and now pushing for a return to the starting XI. Photo: Jez Tighe
11. ST - Colby Bishop
The miss against Lincoln will be eating away at the top scorer. Bet against him putting that right against Cheltenham at your peril. Photo: Jason Brown
12. RW - Owen Dale
Still at the front of the queue to start down the right with Mousinho a fan of the winger. Photo: Jason Brown