Rovers had to settle for a point in an impressive performance at table-topping Peterborough United.
John Marquis fired Rovers into a first-half lead, but the home side pegged them back through a Ryan Tafazolli header in the second period.
Rovers crafted a number of chances to clinch the match, but saw a Tom Anderson header disallowed and a Mallik Wilks effort come back off the inside of a post.
Coppinger took the kick-off, and seconds later was in the box having a shot blocked as a signal of Rovers’ attacking intent.
The first clear chance came with six minutes on the clock, when Niall Mason got past his man on the right and pulled the ball back for Tommy Rowe.
The Rovers captain steered a low shot which looked destined to hit the back of the net until Aaron Chapman got down quickly to tip the ball onto the far post. Marquis was lurking, but Posh captain Alex Woodyard was on hand to clear it behind for a corner.
More success came down the right after 15 minutes when a corner was only half cleared by the Posh defence - it fell to Danny Andrew, whose low ball eluded everyone and goes just wide at the far post.
All the early chances were coming to Rovers, with Rowe glancing a header straight at Chapman and Coppinger’s long-range drive fumbled by Chapman before he gratefully dived on top of the ball with Marquis lurking.
It took 22 minutes for the home side to fashion their first clear chance, with Siriki Dembele feeding Matt Godden - whose low shot fixed just wide.
Rovers continued to press, with Wilks having a couple of efforts blocked and Andy Butler heading wide from a corner.
The home side fashioned a couple of opportunities as the interval approached, with Tafazolli firing well over after a free-kick from the left.
But Marquis ensured Rovers held the advantage at the interval, collecting a pass from Wilks with five minutes to go before advance on Chapman and lifting the ball over the home keeper.
There were no changes from either side at the interval, with Wilks almost doubling Rovers’ advantage six minutes into the second period after being fed by Marquis following a slick counter.
Wills cut inside his man before curling a left-footed effort which bounced off the inside of the far post.
Steve Evans made his first change of the match shortly after this, bringing Ivan Toney on in a straight swop for Godden.
And Posh were back level shortly afterwards, with Tafazolli getting on the end of a Demeble free-kick to head home after 58 minutes.
The home side enjoyed some good possession after the goal, with Colin Daniel stabbing an effort wide, but Rovers were again creating chances shortly afterwards.
Rowe headed straight at Chapman from a free-kick, while a Coppinger effort from the edge of the area again went straight into the arms of a grateful home keeper.
Marcus Maddison and Louis Reed entered the fray for the home side, but it was Rovers who fashioned all the late opportunities.