The Blues are out to make it 27 League One games unbeaten, but face an opponent who’ve won 10 of their last 11 visits to Fratton Park.
It appears something has to give with John Mousinho having injury and selection issues to contend with going into the game.
This is how we think he’ll go as he welcomes former Pompey boss Michael Appleton’s side to PO4.
9. ACM: Christian Saydee
Vying to start and continue his high-impact displays this season. Unlikely he'll do the 90 minutes but could get an hour under his belt. Alternatively Robertson or Devlin could operate in the role with Saydee used as a second-half battering ram. Photo: Jason Brown
10. LW: Abu Kamara
A hard-working display from the Norwich loanee was rewarded with a goal on Tuesday night. Gavin Whyte impressed too, however, and is an alternative. Photo: Jason Brown
11. CF: Colby Bishop
Even with Saydee and Yengi in the building, the magic man is the first name on the team sheet. Nine goals to his name in the league and an example of how to lead the line is displayed every outing. Photo: Jason Brown
12. Sub 1: Ryan Schofield
Really encouraging display at Leyton Orient on Tuesday, but not likely to be enough to displace Pompey No1 Will Norris. Photo: Jason Brown