There are 700 Pompey fans making the trip to Hereford and hoping their side can secure safe passage to the second round of the Emirates FA Cup.
But most people watching the game – in person at Edgar Street or around the world on television – will be keen to see a different outcome.
Michael Morrison knows that the visit to National League North opponents has been picked for live broadcast with an upset in mind.
And the defender wants the Blues to remain professional to ensure their scalp is not claimed by the Bulls.
He said: “You know straight away that it’s going to be a difficult tie and it feels like the crowd are on top of you.
“It’s about approaching the game with the right attitude and showing humility, but we’ve got a really honest bunch here.
"An early goal will settle things down because, apart from people at Pompey, everyone is hoping to see an upset."
“There’s an expectation for us to get on the ball and win, though, so you also need to think ‘we’re the League One team and we want to take the game to them’.
“An early goal will settle things down because, apart from people at Pompey, everyone is hoping to see an upset.
“That’s why the game has been selected to be shown live on TV and it’s up to us to be the party poopers.
“We’ve got a job to do because we want to get into the next round and play against the bigger sides later in the competition.
“Everyone wants to test themselves by facing the top players at the top clubs, plus you don’t want to look silly and be the team that everyone’s talking about for getting knocked out.
“This club has got a rich FA Cup history and so we’ll go there with the right mindset and do what we can to win.”