Pompey could move into the play-off places with victory at Doncaster on Tuesday evening.
But it is the hosts – who lost at Charlton at the weekend – that are the 7/5 favourites with Sky Bet to collect all three points.
Kenny Jackett’s side can be backed at 19/10 to secure a third successive league win, with the draw at 23/10.
It finished 3-1 to Rovers when the sides met in the fourth tier last term and there are odds of 25/1 on Pompey gaining revenge with a reverse of that scoreline.
You might instead want to take a punt on the Blues finishing 1-0 victors at 15/2 or triumphing 2-1 at 10/1.
Oliver Hawkins continues to be the 5/1 favourite to net the opener in the absence of Brett Pitman and is 10/1 to bag another brace.
Elsewhere in the first goalscorer market, Conor Chaplin, Kyle Bennett and Christian Burgess are available at 6/1, 17/2 and 40/1 respectively.
Please gamble responsibly and remember that odds are subject to change.
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