Doncaster boss Sean O'Driscoll was left to rue some poor defending from his side as they went down 5-2 at Leeds and went on to back their Yorkshire rivals to secure a play-off place.
Max Gradel opened the scoring in a dominant United display at Elland Road, and although goals from Billy Sharp and Franck Moussa gave Rovers an undeserved lead just after half-time, Grayson's side were not to be denied the three points.
Skipper Jonny Howson equalised soon after Moussa's strike and further goals from Luciano Becchio, Gradel and another from Howson ensured Leeds were rewarded for an impressive attacking display.
"The manner of the goals in the second half disappointed me," said O`Driscoll. "To concede a goal 30 seconds after you've scored and when you look at the DVD we weren't even ready for the kick-off, in this division you can't switch off especially against a quality side like Leeds.
"Credit to them, they've created chances all afternoon and their front six is probably as good as anything in the league.
"And on this showing they'll be a side that you wouldn't mind a bet on being in the play-offs, and anyone who gets in the play-offs has got a chance."