Pompey will look to cause a Carabao Cup upset when they travel along the south coast to Brighton this evening.
The reward for seeing off Stevenage on penalties last month is a clash with Premier League opposition in the second round.
Lying in wait for the victors is an away tie at Preston in the following stage of the competition – which takes place next week.
And Kenny Jackett does not anticipate making too many changes to his team as he looks to build momentum.
The Blues boss said: “We’ll be going pretty strong and I do feel that the side needs to continue finding some rhythm.
“It’s a big few days for us, starting with Brighton, and we want to give a good account of ourselves live on Sky against a Premier League team.
"We’ll go there as the underdogs, but you’ve always got a chance and we have to work out a way to get a positive result."
“The players have to go out there and enjoy the occasion, while looking to cause an upset – that’s the aim.
“If we can do that, then that will help with everyone’s confidence ahead of the trip to Rochdale on Sunday.
“We’ll go there as the underdogs, but you’ve always got a chance and we have to work out a way to get a positive result.”
Fans hoping for a glimpse of new signing Michael Jacobs at the Amex Stadium could be left disappointed.
Jackett explained: “He’s worked with us for the past few days and we have to make sure that when he does get to full match fitness, he stays there.
“We do feel that he needs some more training and so he definitely won’t be starting for us at Brighton.”