The Blues proved too hot to handle for their Fratton Park visitors as Colby Bishop, Ronan Curtis, substitute Michael Jacobs and Connor Ogilvie cancelled out Joe Ironside’s 30th-minute opener.
The wins means Pompey remain unbeaten in all competitions and move up to third in the League One table.
Here’s how Mark McMahon rated the players’ performance on a pulsating night of action under the lights at PO4.
13. Michael Jacobs - 7
(Replaced Dane Scarlett on 63 mins): What an impact from the bench. Photo: NationalWorld
14. Joe Pigott - 6
(Replaced Colby Bishop on 72 mins): Looked a threat after coming on. Photo: Nationalworld
15. Reeco Hackett - 7
(Replaced Owen Dale on 72 mins): Set up Ogilvie for Pompey’s fourth. Photo: NationalWord
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