Burnley manager Owen Coyle fears Brian Jensen and Martin Paterson could miss this weekend's re-arranged FA Cup clash with Arsenal.
Goalkeeper Jensen and striker Paterson picked up knocks in Tuesday's 1-0 win at Blackpool.
The pair suffered dead legs at Bloomfield Road and they face a race against time to be fit for the fifth round trip to Emirates Stadium.
"Brian's got a dead leg, as has Martin Paterson, and that's why I took him off in the second half," said Coyle.
"There are a number of concerns, but we'll see how everyone is ahead of Sunday's game."