Rovers boss Tony Mowbray says a few of his players are feeling the effects of training and playing in tough conditions ahead of this weekend's game against Charlton.
Mowbray's men came through a tricky test to see off Crewe in Wednesday's Emirates FA Cup second-round replay, and could move into League One's automatic promotion places with another win on Saturday.
Asked to provide a team news update in his pre-match press conference, the manager says he hopes players recover in time for the clash.
“There are a few strains, and some that probably won’t train today or tomorrow," he said.
“Hopefully, we’ll have them available for Saturday. I think the frost and playing on a soggy pitch has caught a few muscles out.
“Hopefully it’s nothing too serious, training will be pretty low key for the next couple of days.
"We don’t want to leave them undercooked for Saturday - it’s an important football match.
"The plan wasn't to play Craig [Conway] against Crewe, but Marcus [Antonsson] picked up a little niggle.
“The intensity level sometimes needs building up, it’s not always easy when you’re expected to fly out of the traps.
“It’s not a fitness issue, they’ll get through 90 minutes, there are just a few tight muscles.
“I’ve found in my 30 years in football that when you train and play on different surfaces, players get injured, particularly muscle injuries.
“As I say, we’ve got one or two niggles, but fingers crossed they aren’t too problematic."
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