The Blues have made an unsatisfactory start to the campaign, collecting just two points from their opening three games.
Calls for Kenny Jackett to be sacked by fans have increased and the boss knows he must deliver at the Pirelli Stadium.
Following last weekend’s insipid 2-1 loss to Wigan, Jackett may look to make changes to his starting XI against the Brewers.
Here’s a look at how Pompey could line-up...
13. Sub 2 - Rasmus Nicolaisen
Will be pushing for a starting spot in training. Photo: HENNING BAGGER/AFP via Getty Images
14. Sub 3 - Cam Pring
A need for leaders could see the Bristol City loanee come out of the starting XI in place for Brown. Photo: Joe Pepler
15. Sub 4 - Bryn Morris
Kenny Jackett's not been too pleased how the former England youth skipper has looked next to Tom Naylor in the engine room. It suggests he might come out of the line-up. Photo: Joe Pepler
16. Sub 5 - Ben Close
Wouldn't be a big shock if he does start at the Pirelli Stadium. However, having made just one substitute appearance so far, Andy Cannon might just get the nod. Photo: Joe Pepler