Aaron Lennon could be facing a spell on the sidelines after suffering a knee injury at Wembley.
The Clarets’ winger picked up a knock against his former club as Burnley were beaten 1-0 by a late Christian Eriksen goal for Tottenham Hotspur last Saturday.
Lennon played until the 93rd-minute before a late tactical switch but reported some discomfort afterwards.
And after seeing a specialist and under-going a scan on Monday, the former England international, 31, may now require surgery.
Manager Sean Dyche confirmed: “I will find out more accurate information later, but he has a chance of needing an operation.
“We had it checked out and it looks like there was something there, and they will deal with that accordingly.”
Lennon, 31, has figured in all but one of the Clarets’ Premier League games so far this season and was a permanent presence last term after signing from Everton in January.
His absence would be a blow over the Christmas holiday programme, but the return of Johann Berg Gudmundsson could now be an even more timely one.
Gudmundsson missed the game at Tottenham after picking up a knock in the Clarets’ 1-0 win over Brighton the weekend before.
But the wideman is back in training and in with a chance of returning at Arsenal on Saturday.
“He’s trained properly yesterday and today and it’s still early in the week, so we’re hopeful,” added Dyche.
Further good news comes in the shape of Stephen Ward’s return to training.
The left-back hasn’t featured in the Premier League since the end of August and under-went knee surgery following the Clarets’ exit from the Carabao Cup in September.
“He’s back in training and back on the grass with us, but will need a bit of time yet,” said Dyche, who also has goalkeeper Nick Pope heading back towards first-team consideration.
The England international played his first game in five months for the Under-23s on Monday after recovering from a dislocated shoulder.
And he will now be given further match practice to get up to full speed.