Nick Pope's injury will concern Sean Dyche ahead of the new Premier League season as Burnley drew 1-1 at Aberdeen in the Europa League.
Sam Vokes struck a late equaliser as Burnley came from behind to claim a 1-1 draw at Aberdeen in the Europa League's second qualifying round.
Substitute Vokes controlled a knockdown from strike partner Chris Wood to lash home with 10 minutes to play in Burnley's first European tie for over 50 years.
Gary Mackay-Steven's penalty looked set to earn Derek McInnes' side a 1-0 home win at Pittodrie on Thursday, Anders Lindegaard beaten from 12 yards five minutes into his debut.