The Warriors led 6-0 just moments into the game and 12-6 just moments into the second half, but Rovers came from behind twice to claim the victory.
Sean O’Loughlin opened the scoring for Wigan with a well-worked try after just five minutes of play, Pat Richards tagging on the two points for a 6-0 lead.
The wet conditions led to a high turnover of possession and the only other first-half score was a controversial try for Hull KR.
The try in question was controversial because it came after the half-time hooter, Michael Dobson getting over the line and referee Richard Silverwood awarding the late score, Dobson then adding the goal to draw level.
Parity was shortlived however, the Warriors came out full of determination after the restart, almost immediately regaining their lead throuh O’Loughlin, Richards again converting.
The visitors held firm against Wigan’s attempts to get back into the game, and a Dobson penalty just moments from full time sealed their win.