Pompey were clutching a slender lead in their quest to reach the last 16 of the Papa Johns Trophy at Ipswich.
So substitute Zak Swanson was delighted to slot home in stoppage-time and ease any nerves being felt by the hardy band of travelling fans.
That added to Dane Scarlett’s neat finish at the end of the first half to ensure the Blues would book their place in Thursday’s draw.
And Swanson felt that they got their game-plan just right to beat the side who are favourites to top League One this season.
He said: “It’s a good result for us to progress in this competition and we’re delighted with the win against really tough opponents.
“Ipswich are a good side and they like to dominate the ball, but we set the traps and knew our time would come.
"I’m really enjoying my football at the moment and am growing in confidence, which happens when you get a run of games."
“We came through a tough start and then created the best chances of the game – we like to think we should have been further ahead at the break.
“I made the run late on and was one-on-one with the keeper and then realised where the Pompey fans were to celebrate with them.
“I was delighted to score and we were under the cosh a bit, so it was nice to be able to take the pressure off.
“I’m really enjoying my football at the moment and am growing in confidence, which happens when you get a run of games.
“Now we’ve got another match in a different competition at the weekend and we’re looking to go on an FA Cup run if we can.”
Swanson has featured at right-back in his previous appearances for Pompey, but came on in midfield during the second half at Portman Road.
He said: “I’ve actually played there a few times before, so I’m familiar with the role and enjoy being there. Now I might get a chance up front!”