Former Blues boss Steve Cotterill lies in waits with five games of the League One season remaining.
His side had won their five past home games on the spin, before defeat to Peterborough last time out.
So a tough test lies in wait for John Mousinho’s side, with play-off hopes receding going into the game.
Pompey have fitness and suspension issues to consider going into the game – so this is how we think they will line up at New Meadow.
9. RW - Owen Dale
With Paddy Lane coming back from injury, Dale looks likely to continue at New Meadow. Photo: Jason Brown
10. CF - Colby Bishop
Waiting for Magic Man's 20th league goal of the season. Chances are we won't be waiting too long. Photo: Jason Brown
11. LW Reeco Hackett
Came off the bench on Monday - and has often started on the road of late under Mousinho. Photo: Simon Davies
12. SUB - Josh Oluwayemi
Back on the bench after recent illness and set to continue as Macey's deputy. Photo: Jason Brown