It represents the first opportunity for the Blues to put that disappointing performance against Wycombe to bed, following the postponement of Saturday’s trip to Accrington.
It also allows Danny Cowley to get much-needed minutes into his players’ legs ahead of this weekend’s important League One game against MK Dons.
But what does the head coach do with his line-up and formation with such a big game on the horizon?
Does he give his regulars starting berths to get that Wycombe performance out of their system – but risk losing some of them to injury?
Does the boss stick to his policy of giving his fringe players the chance to shine in the Trophy and keep faith with the side that beat Ipswich last time out?
And does he abandon the three-at-the-back system that was rolled out not-so-successfully at Adams Park?
There’s so many questions which only Cowley and his coaching team can really answer.
Nevertheless, here’s how we think Pompey will line up tonight as they look to book a quarter-final place in the Papa John’s Trophy...
But what does the head coach do with his line-up and formation with such a big game on the horizon?