Pompey are on a run of four successive wins in League One, while also extending their league unbeaten run to seven games with a win over Gillingham on Saturday.
However, there was a shock as some of the Blues’ promotion-chasing rivals slumped down the form table.
We take a look at which teams are in and out of form, based on the last six League One games.
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9. Sunderland - 7 points
The first real surprise as promotion-chasing Sunderland sit 16th in the form table having lost three successive League One games before victories over Ipswich and Cambridge United have since steadied the ship. (Photo by George Wood/Getty Images) Photo: George Wood
10. Cambridge United - 7 points
It’s been a steady start for the U’s as they sit six points above the relegation zone and have picked up seven points from their last six fixtures. (Photo by Pete Norton/Getty Images) Photo: Pete Norton
11. AFC Wimbledon - 7 points
The Wombles have a mixed record from their previous six games, including a 2-1 loss to Pompey last week, however they’ve still struggled against teams below them. (Photo by Alex Davidson/Getty Images) Photo: Alex Davidson
12. Plymouth Argyle - 7 points
Ryan Lowe’s side had a flying start to the season but over the last six matches have had a slump in form, losing their last three. (Photo by Dan Mullan/Getty Images) Photo: Dan Mullan