The Blues had been facing defeat after James Collins’ 85th-minute penalty, an outcome which would have been really harsh on them.
However, Bishop turned home Terry Devlin’s pass at the death to cap a good Pompey display - and here are our player ratings…
9. Gavin Whyte - 6
Handed the number 10 role behind Bishop in absence of Saydee. Had one second-half shot deflected by Bishop, but it flew straight into the keeper’s arms. Overall still to discover that creative spark for Pompey, although put the ball in which resulted in Pompey's stoppage-time leveller, so deserves credit for that. Photo: Jason Brown
10. Paddy Lane - 7
(Replaced on 90 mins by Jack Sparkes) First league start of the season for the Irishman. Put in one second-half free-kick met by the head of Ogilvie and saved, while had some other encouraging moments. Needs to now be given a run in the side. Photo: Jason Brown
11. Colby Bishop - 8
Had one goal-bound header cleared off the line by Waghorn in the first half, while later needlessly took a touch before shooting and it was charged down. But eventually made no mistake with the stoppage-time leveller after converting Devlin’s assist. Photo: Jason Brown
12. Portsmouth defender Zak Swanson (2) during the EFL Sky Bet League 1 match between Derby County and Portsmouth at the Pride Park, Derby, England on 16 September 2023.
Zak Swanson cannot believe his luck in the first half of the Pride Park encounter with Derby. Picture: Jason Brown/ProSportsImages Photo: Jason Brown