Josh Murphy, Kusini Yengi and a Jack Sparkes stunner with the last kick of the game secured victory for John Mousinho’s men, with Ashley Yearwood netting for the hosts in the 86th minute.
The Blues named a different team for each half, totalling 22 players, and included triallists Jamal Baptiste and Sean Patton, who both played the opening 45 minutes.
A bumper crowd were present at Privett Park for an entertaining match – and here are our Pompey player ratings...
9. Anthony Scully - 6
(Replaced by Paddy Lane on 46 mins) Buzzed around and tried to make things happen, but nothing quite came off for the fit-again winger. Still, after last season's injury problems it was a welcome return to involvement - and there's still more to come. Photo: Jason Brown
10. Callum Lang - 7
(Replaced by Christian Saydee on 46 mins) Along with Murphy, Pompey’s chief attacking threat in the first half and posed plenty of problems with his energy and enthusiasm. Claimed an assist too for Josh Murphy's goal. Photo: Jason Brown
11. Josh Murphy - 8
(Replaced by Sammy Silvera on 46 mins) A mercurial performance from the left winger, who took just 20 minutes to open his Pompey goal account with a right-footed finish from Callum Lang's pass. A constant threat, gliding across the ground and often showing blistering pace. Very, very encouraging. Photo: Portsmouth FC
12. Triallist B (Sean Patton) - 5
(Replaced by Kusini Yengi on 46 mins) The youngster wasted a couple of glorious opportunities, hitting both over the bar first time when well placed. Certainly not the first introduction to the fans he would have wanted in a disappointing showing. Photo: Jason Brown