Pompey will try to maintain their position at the League One summit when they host Wycombe this weekend.
And Kenny Jackett’s side are the 4/6 favourites with Sky Bet to secure all three points from the Fratton contest.
The visitors – who secured automatic promotion from the fourth tier last term – can be backed at 17/4, with the draw at 11/4.
It finished 4-2 to the Blues when the sides last met on the south coast in the league and a repeat of that scenario is priced 50/1.
Those not expecting it to be quite so dramatic might instead be tempted by a 2-0 win at 13/2 or a 2-1 triumph at 8/1.
You can also hedge your bets by choosing the game providing fewer than 2.5 goals at 4/5 or more than 2.5 at 10/11.
And if you think Pompey will have to battle from an interval deficit to come out on top, then that carries odds of 25/1.
Skipper Brett Pitman and top scorer Ronan Curtis are the joint 7/2 favourites to net the opener on Saturday.
Elsewhere in the first goalscorer market, Oli Hawkins, Jamal Lowe and Matt Clarke are available at 9/2, 11/2 and 22/1 respectively.
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