Tony Mowbray says he was shocked by "unrecognisable defending" from his side at Deepdale as Rovers suffered a heavy defeat at Preston North End.
Two early strikes from Tom Barkhuizen and Callum Robinson got North End up and running in the East Lancashire derby.
And although Danny Graham pulled one back just seconds into the second half, the hosts bagged two more through substitute Louis Moult and Alan Browne to heap further misery on Mowbray and his men.
And speaking to iFollow Rovers after the game, the boss was critical of Rovers' lacklustre defending.
“It was down to us defending very poorly today. Some of it you can’t really account for but some was also poor decision making. We need to improve," Mowbray said when reflecting on what he'd seen.
“They have some good attacking players, there’s no doubt about that, and it was a game where we knew we’d have to be at the top of our game defensively.
“We didn’t, we weren’t at the top of our game defensively. That showed in the opening couple of minutes and it just continued from there.
“I think we reacted alright to going two goals down and had some good chances, including two headers from set pieces that almost went in.
“We didn’t get the goal that we needed before half time, but got the goal after the break before the theme continued. It was unrecognisable defending from us."
And Mowbray also revealed home truths to his players in the dressing room following the horror show.
“The lads have got a lot of stock with me, a lot of brownie points in the bag for their defending over almost two years now," he added.
“I’m trying not to be too harsh on them, but it simply has to be better, it has to be stronger if we are to achieve what we want to this season."