Pompey were left rueing a defensive collapse just eight days earlier.
So there was a mixture of joy and relief that they got things right at both ends of the pitch against Queens Park Rangers.
A John Marquis penalty and Marcus Harness goal ensured the Blues won at their Championship hosts to reach the third round of the Carabao Cup.
And Joe Gallen reckons it was the perfect tonic to get the previous week’s disappointing draw with Coventry out of the system
Pompey’s assistant manager said: “It was a great win. It’s fantastic to come to a Championship club, keep a clean sheet and go through to the next round.
“We’re especially pleased for our fans. There were close to 2,000 of them and they didn’t stay quiet for one minute.
“It was unfortunate that Saturday’s game was called off because we wanted one straight away after what happened against Coventry.
"We’re especially pleased for our fans. There were close to 2,000 of them and they didn’t stay quiet for one minute."
“But we’ve been working hard on the training ground – with both the defensive and offensive side of things.
“It’s all clicked on this occasion. We know we’ve got the players who can create chances and we needed to keep things tight at the back to give everyone confidence.”
Pompey made some defensive switches, with Christian Burgess deployed in an unfamiliar right-back role, while Tom Naylor was also handed a defensive berth.
Gallen explained: “Tom has played there before – including in pre-season – and Christian is an experienced player. We’re looking to find the most solid unit we have.
“I understand if the fans might have been a bit panicky at the start, but I think everyone can admit it worked well.
“James Bolton had hurt his ankle and we thought there might be a small crack, so he had a scan on it, but it’s severe bone bruising.
“He has been training with us, but he’s been at around 80 per cent, so we didn’t want to take any risks.”
Pompey’s next match in the contest is one to look forward to, with a first clash between fierce south rivals for more than seven years.
Gallen said: “It is great. I really love derby games and I think it's brilliant that we're now going to play Southampton.”