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.
1. Josh Griffiths - 8
Made two terrific first-half saves to deny Shilow Tracey and another early in second in best performance yet for Blues. Photo: NationalWorld
2. Joe Rafferty - 7
Is proving a shrewd piece of business. Another solid performance. Photo: NationalWorld
3. Sean Raggett - 8
Man mountain at the back again and set up Bishop’s equaliser. Photo: NationalWorld
4. Michael Morrison - 7
Didn’t let Pompey down with another solid performance. Photo: NationalWorld