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...
5. Beau Mullins - 8 - MOM
One of the youngest on display and produced some very testing crosses from left-back, particularly in the second half. A real driving force down the left and hugely encouraging display. Photo: Mike Hewitt
6. Mitch Aston - 7
Neat and tidy again from the midfield, who always wants the ball and is always trying to make things happen. Continues to impress. Photo: Jason Brown
7. Dan Murray - 7
Hard-working showing from the midfielder. Bags of energy and won't shirk a physical challenge. Photo: Jason Brown
8. Jayden Keteku - 6
(Replaced by Harry Clout on 71 minutes) Plugged away trying to make things happen, but didn't quite happen for the attacker. Have to admire his commitment, though. Photo: Jason Brown