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.
![Pompey were victorious at Cheltenham earlier in the season.](https://www.portsmouth.co.uk/webimg/b25lY21zOjEyMTE1OTJmLTgxOTQtNDlkMC05YTkwLWNjYjE3NTdkNTJhYzowNTMwNDQ5NS1mOWMzLTQzZDAtOWVlNS0yOWIxNzUxYmQwNzI=.jpg?crop=3:2&width=640)
1. Pompey predicted line-up
Pompey were victorious at Cheltenham earlier in the season. Photo: Jason Brown
![Looking for third clean sheet on the spin and his fifth since joining on loan from Luton.](https://www.portsmouth.co.uk/webimg/b25lY21zOmVlZTNjMzE5LTZjNzAtNDhjYi1hOTY3LWJjMTlhODFmMzFhNzo3NjQ0NzNiMC0yZjUyLTQ3ODEtOWY5OC0wMzYxYjkxNDNjNWE=.jpg?crop=3:2&width=640)
2. GK - Matt Macey
Looking for third clean sheet on the spin and his fifth since joining on loan from Luton. Photo: Jason Brown
![What a reassuring presence the Scouser has been after putting his Pompey injury hell to bed.](https://www.portsmouth.co.uk/webimg/b25lY21zOjc5YTQwMjgxLWI0YWQtNGU1Yy1hODVmLTY4MDRmOWMyYTc1ZTowMWU5NWEzNC02NmNlLTQzZmUtOWQ1OC0xY2Y2N2E4ZGEyYTI=.jpg?crop=3:2&width=640)
3. RB - Joe Rafferty
What a reassuring presence the Scouser has been after putting his Pompey injury hell to bed. Photo: Jason Brown
![Has the captain's armband but is being pushed hard by Di'Shon Bernard.](https://www.portsmouth.co.uk/webimg/b25lY21zOjc5MWQyYmMyLTZhMzUtNDIyMy04YTc2LWQ5MTVjYWViNWE0MjozYTNhMmNiYy04MWM4LTQ1ZTYtOWFhMS1lNDAzYWEyY2Y2MGQ=.jpg?crop=3:2&width=640)
4. CB - Sean Raggett
Has the captain's armband but is being pushed hard by Di'Shon Bernard. Photo: Jason Brown