The Blues appeared to be heading out with a 1-0 defeat at Wessex League Division One side Folland Sports in the third round of the competition.
But substitute Harry Clout took the fixture to penalties following a leveller two minutes into time added-on.
Unfortunately the Blues subsequently lost out 5-4 on spot-kicks, but it was still a brave display – and here are our Pompey player ratings...
9. Luke Staight - 6
Operated on the left of the midfield diamond and never stopped running, while linked up well with Beau Mullins down the left flank. Put plenty in. Photo: Colin Farmery
10. Connor May - 7
A lively display up front, full of ideas and movement. Unfortunately missed the first penalty, although his shot nearly knocked the keeper into the net while catching it. Photo: Mike Hewitt
11. Maxwell Hurst - 7
Struck the bar with a smart backheel and led the line well in a hard-working display. Caused problems in the air and a willing runner. Photo: Chris Moorhouse
12. Cody Howard - 6
(Replaced Kevin Bosaka on 46 minutes) Added good height at the back and stood up well after introduced at half-time. Photo: Mike Hewitt