The Blues were poor throughout the Memorial Stadium encounter and missed out on a chance to move up to third in the League One table.
Here's how chief sports writer Neil Allen rating Kenny Jackett's troops...
9. Ryan Williams - 7
Lovely assist and full of running but faded badly first half Photo: Nigel Keene
10. John Marquis - 6
Set Pompey on their way but should have got a hat-trick Photo: Nigel Keene
11. Ronan Curtis - 7
Had some good moments and far from poor, but part of half-time shake up Photo: Jason Brown
12. Lee Brown (replaced Charlie Daniels 46 mins) - 7
Just what Pompey needed and added thrust down left Photo: Graham Hunt
3 / 4