Rovers are 9/2 to progress through to the Sky Bet League One play-off final ahead of the semi-final second leg against Charlton Athletic.
Grant McCann’s side lost 2-1 in the first game between the two sides, and a reverse of that score-line is available at 14/1.
Top scorer John Marquis has already scored at the Valley this season, and he is priced at 11/2 to open the scoring on Friday night.