Pompey’s hopes of automatic promotion came unstuck against Peterborough near the end of last season.
A 3-2 defeat at Fratton Park in the penultimate fixture consigned the Blues to an ultimately unsuccessful play-off quest.
Posh come to town again on Saturday, sitting third in the table and having scored more goals than any other League One side.
Craig MacGillivray will be tasked with keeping out their prolific forwards, as the hosts look to extend their six-match winning run.
The keeper said: “There’s no getting away from the fact that was a massive game for us at the time and it ultimately knocked us out of contention for the top two.
“I suppose we can use that as motivation, while there’s also the chance to claw them back in the league.
"The start we made was obviously frustrating and a lot of late goals were conceded, but now everyone’s gelling and working hard."
“We want to carry on this unbeaten run if we can, but Peterborough have undoubtedly had a very good start.
“They have scored an awful lot of goals this season and two of their players are the division’s top scorers.
“We know it’s going to be a massive test for us and we know we need to produce a decent performance to continue our good form.
“We’re 17 games into the league campaign and so it’s still relatively early days, with plenty still to come.
“The start we made was obviously frustrating and a lot of late goals were conceded, but now everyone’s gelling and working hard.”
MacGillivray could be taking part at Euro 2020 next summer, with Scotland needing to win two play-off matches in March to join England in Group C.
He said: “It’s a long way off, but it’s an opportunity for the country to get to a major tournament for a long time and bring a bit of positivity to Scottish football.”