Craig Conway scored just before the break to give Blackburn Rovers a 1-0 half-time lead over Rotherham United at Ewood Park.
Neither side were able to dominate as they would have liked early on, but Blackburn created the first chance when Jordan Rhodes headed wide from a Tom Cairney free kick.
The hosts started to take control of the game midway through the opening 45 minutes, and a clever passing move set up a good chance for Jay Spearing, whose effort was deflected to safety.
Blackburn were dealt a blow when the influential Jason Lowe was forced off with what appeared to be an ankle injury.
A spell of Rotherham pressure arrived before the break, but they struggled to create chances, and were denied what they felt was a penalty when Matt Derbyshire's shot hit Matt Kilgallon.
The misery was piled on the visitors as Blackburn took the lead through Conway, who cut inside from the left wing to find the top corner with a curling effort.
Callum Mulvihill
