View the gallery from the Blues' latest triumph
Pompey made it five wins on the bounce after securing a 3-2 victory over relegation-threatened Wycombe at Adams Park.
Jamal Lowe fired them into an early lead and despite a dominant first half performance, Craig MacGillivray had to make a couple of fine saves.
Brett Pitman slotted home to double the advantage seconds after the interval and although Marcus Bean pulled one back, the skipper soon added a fine free-kick.
A stunning Scott Kashket strike reduced Wanderers' deficit, but the Blues saw out the closing stages to secure all three points.