Doncaster moved off the bottom of the Championship table as they shocked league leaders Southampton.
Billy Sharp scored the only goal of the game when he was on hand to steer home a cross from Marc-Antoine Fortune.
Morgan Schneiderlin had the best chance for the visitors when he sprung the offside trap but Carl Ikeme reacted well to make the save.
The win, only Rovers' second in 10, moves them above Coventry while Saints stay top following West Ham's defeat.
Doncaster had lost six of their previous nine matches but started brightly and could have taken the lead as early as the second minute.
Herita Ilunga was left unmarked from a Brian Stock corner but the defender, on loan from West Ham, could not keep his header on target.
Simon Gillet then bought a good save out of Kelvin Davis before Sharp and Stock both fired wide, while Ilunga saw a header cleared off the line by Jose Fonte.
Guly do Prado bought a good save out of Ikeme for the visitors before Sharp scored his seventh goal to condemn Southampton to only their fourth defeat of the season.