The win marked the Blues’ first win in four games, a streak which included dropped points against key promotion rivals Ipswich and Plymouth.
After an unbeaten first nine fixtures to the campaign, Danny Cowley’s men raced into the top two along with the Tractor Boys.
However, recent results have seen Pompey slip to fifth in the table - but crucially have two games in hand on the teams around them.
But has their start to the season done enough to convince the bookies they’re strong promotion contenders?
We’ve taken a look at the latest Sky Bet odds to see how they Blues’ chances of success this season against their League One rivals.
NOTE: Morecambe and Forest Green were not included in Sky Bets odds and have been left out.
Here’s what we found.