Tony Mowbray says his squad will need to step up in adversity after injuries to the defensive duo of Darragh Lenihan and Greg Cunningham.
The Irish pair will be long-term absentees after picking up knee injuries against Queens Park Rangers last time out, with Cunningham out for the season and Lenihan missing for the next few weeks.
The crisis means Mowbray will need others to step up to the plate, with Tosin Adarabioyo set to start in place of Lenihan this weekend against Huddersfield Town.
A further reshuffle will likely see Amari'i Bell fill Cunningham's now vacant left back spot.
“Both players have damaged their knees and it’s never great for a professional footballer to do that," the boss told iFollow Rovers when reflecting on his injured pair.
“Greg’s looks more serious than Darragh’s as it’s a partial tear of an ACL.
“The specialist who looked at the scans and they and Cardiff want the full repair of his ACL. It’s a real disappointment for Greg that it’s the end of his season.
“We wish him a speedy recovery and we’ll decide with Cardiff whether he’ll have his treatment with us here at Rovers or back at Cardiff.
“Whatever we decide, that decision will be made by his parent club.
“He’s a focused footballer who saw us as an opportunity to get game time after a bit of a frustrating first season at Cardiff.
“His performance levels for us were high, but he’s got some tough times ahead of him. He’ll be in the gym every day whilst the lads are out training, which is a tough shift.
“Lenihan strained his lateral ligament and there looks to be a problem with the attachment of his hamstring," he added.
On the 25-year-old centre back, Mowbray is hopeful that he could be back sooner, but won't rush the Republic of Ireland international back to full fitness, particularly with the availability of Adarabioyo.
“The diagnosis with Darragh is that he’ll be out for six weeks, hopefully a bit less, but potentially a bit longer," he said.
“Everyone rehabs at different speeds, but we’ll be missing Darragh for a few weeks.
“It’s frustrating, but that’s why you have squads and that’s why we have big Tosin on loan from Manchester City.
“He impressed against Fulham and played 70 minutes against Millwall before the final half an hour at QPR. Hopefully he can be a big player for us.
“He’s quick and passes the ball, the attributes are all there, he just needs to bed himself in.”