Tony Mowbray was left frustrated by his side's killer instinct following a narrow defeat to Preston North End at Ewood Park.
Daniel Johnson's early strike was the difference on derby day, in front of more than 21,000 supporters.
And speaking afterwards, Mowbray was left ruing his team's cutting edge against Alex Neil's side.
“I think the attributes of this team are on show, whether we were winning games up to January or losing games since then," the boss said post-match.
“It’s been pretty much the same to the performances we’ve had all season.
“At this moment we’re not able to turn them in to goals or victories. Performance wise, effort wise, desire, commitment, drive, honesty, they were all there.
“The bit that makes the difference, the quality around the final third, the final pass, the final contact on a finish, that wasn’t there.
“Ultimately, I can’t be too harsh on them. We’re left frustrated.”
Both Danny Graham and Adam Armstrong had the best opportunities of the game, and Mowbray admitted that on another day his side could have found the net a few times.
“Armstrong had a great chance at the back post to side-foot it in to the net, but puts it in to the ground and in to the goalie’s arms.
“We had a few decent opportunities to score but didn’t take them.
“The game became a bit bitty. They scored early and then there were too many stoppages.
“I’m conscious about sitting here and criticising the referee, but goodness me, it’s a local derby, you’re allowed to show a bit of commitment and tackle people in my opinion."