Tony Mowbray admits it is too early to tell the extent of the injuries picked up by Darragh Lenihan and Bradley Dack in Saturday's loss to Southend United.
Dack made way just past the hour mark after feeling tightness in his hamstring, whilst with Rovers having made all three substitutes, defender Lenihan had to play on dispite some obvious discomfort.
Mowbray doesn't know the seriousness of either injury just yet, but neither player is likely to be risked on Tuesday night against Coventry City.
"We'd have brought him off if we hadn't made any changes," said the Rovers boss on Lenihan.
"We ended up just sticking him up front to see if he could win a few flick-ons.
"It wasn't ideal, we were playing with ten men for a spell in the game where we'd have liked to have really pushed on and tried to get an equaliser but it didn't really materialise. Probably because we were playing with ten men.
"It is too early to tell you exactly what the problem is or how long it will be.
"Bradley Dack also felt a twinge in his hamstring which isn't ideal. He goes through pre-season looking fantastic for us with great awareness and ability. So it is frustrating for us that he's picked up an injury for us as well."
Rovers are back in action this Tuesday night when they travel to take on Coventry City in the first round of the Carabao Cup.
Tickets are currently on open sale priced at Adults £12, Seniors 60+ £8, 18-21 £8
and Under 18 £1. Book online today at www.eticketing.co.uk/onerovers/