Owen Coyle felt Rovers had a perfectly good goal chalked off as they slipped to a narrow 1-0 loss at the hands of Sheffield Wednesday.
Rovers trailed at the break following Steven Fletcher's deflected first half strike, but they thought they had claimed a share of the points ten minutes from time when Marvin Emnes fired home from ten yards.
But the linesman's flag was raised for a supposed offside in the build-up to leave the manager frustrated.
"I don't think it was the prettiest of games," Coyle told Radio Rovers.
"Sheffield Wednesday paid us a huge amount of respect by coming and sitting everybody behind the ball and try to play on the counter-attack.
"We had a couple of chances to get our noses in front but then we get punished by a deflection that ends up in the top corner, but it was something we could have avoided.
"We then had a great chance with Marvin Emnes in front of goal and the keeper makes the good save.
"We dominated the second half in terms of possession but our passing could have been quicker, slicker and sharper, and we probably didn't test them as much as we would have liked.
"But we felt we scored a perfectly good goal, the linesman has deemed it offside, so it is really hard to take because I thought we were worthy of something from the game.
"I spoke to the fourth official and the linesman has said that Danny Graham was offside, I've watched it back and when the boy clears the ball into Marvin Emnes's path Danny Graham is easily four yards behind to his left hand side and hasn't made an attempt to get on the ball.
"So it is hard to bear because we have scored a perfectly good goal. We are sitting here with no points from the game when I felt we did enough to get something from it."
Rovers are back on their travels for the final game before the October international break when they face Birmingham City at St. Andrew's this Saturday.
Tickets for the match are currently on open sale priced at £20 for Adults, £15 for Seniors 65+, £15 for Students (must produce a valid NUS card at the turnstiles),13-18’s £10 and Under 13’s £5.
Book online today at www.eticketing.co.uk/onerovers, in store at Ewood Park or via our call centre on 01254 372000.