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.
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.
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