Bristol Rovers came from behind to beat Doncaster 3-1 and extend their unbeaten run to six Sky Bet League One matches.John Marquis gave Doncaster an early lead but goals from Ryan Sweeney and Rory Gaffney saw the visitors turn the tables at the Keepmoat Stadium before Ellis Harrison put the game to bed five minutes from time.Doncaster made an excellent start and took the lead after four minutes when Marquis side-footed in Matty Blair's low cross at the near post, ending the striker's 12-game barren run.The hosts were significantly unsettled after defender Joe Wright was forced off with injury in the 19th minute and Bristol Rovers took advantage when Sweeney bundled in from Liam Sercombe's knockdown.Bristol Rovers started the second half strongly and took the lead in the 50th minute when Gaffney chested down a Harrison flick-on and drilled past Ian Lawlor.Doncaster pushed for an equaliser and Blair missed a glorious chance two yards out at the back post.But Harrison made sure of the win in the 85th minute when he was sent clear by Gaffney before slamming a shot under Lawlor.