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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5. Morecambe - 5 points
After a strong start to the campaign, the Shrimps have only picked up five points, which included a last-minute win over Fleetwood last week. (Photo by Charlotte Tattersall) Photo: Charlotte Tattersall
6. Accrington Stanley - 5 points
Stanley have also picked up five points out of a possible 18, but won their last game against Lincoln. (Photo by Daniel Chesterton/phcimages.com) Photo: Daniel Chesterton
7. Lincoln City - 6 points
Michael Appleton’s side have failed to pick up points from their last two games and sit 18th in League One and lost 3-0 to Pompey last week. (Photo by George Wood/Getty Images) Photo: George Wood
8. Burton Albion - 6 points
After four successive defeats in the league, Jimmy Floyd Hasselbaink's side have picked up maximum points from their last two games. (Photo by Charlotte Tattersall/Getty Images) Photo: Charlotte Tattersall