Manager Tony Mowbray insists he was forced to make a tactical change in the first half in order to counter Derby County's dominance.
The home side laid siege to the Rovers goal at times in the opening period, as they looked to bounce back from a disappointing defeat to Rotherham at the weekend.
And it was during a sustained period of pressure from the Rams that the Rovers boss brought on Danny Graham, just past the half-hour mark.
Craig Conway was the unfortunate man to make way, but Mowbray insists he needed to do something for the good of the team.
"I feel for Craig, because he's waited very very patiently," said the Rovers boss after Tuesday night's 0-0 draw at Pride Park.
"They were going to score. You could feel it. They were opening us up too much and we needed to change something.
"We needed a platform to play off basically. I didn't change like-for-like, I put on a centre forward who could get hold of the ball for us.
"We'd hoped to be able to play through them - get it into Bradley (Dack) and slide Adam (Armstrong) in down the side.
"I think it was the same front four that went to Carlisle in the cup and scored five, but Derby County are not Carlisle United, so in my opinion it needed a change.
"It's really harsh on a lad getting brought off in the first half, but the team is more important than any individual and that's what happened tonight."