Swansea City midfielder Tom Carroll is facing up to six weeks on the sidelines with ankle ligament damage.
The England Under-21 International was hurt during their 1-0 victory over the Czech Republic last Friday, in which he scored their only goal.
A spokesman for Swansea City confirmed the 22-year-old is now expected to be out for between four and six weeks.
So far Carroll has made 18 appearances for the Swans, after joining them last summer on a season-long loan.
Elsewhere it's understood manager Garry Monk is awaiting results of a scan on winger Jefferson Montero, who reportedly suffered a muscle strain last weekend.
The Swans continue their Premier League campaign on Saturday, when they host Hull City.
Swansea City have beaten Aston Villa away in the Premier League after a late goal from Bafetimbi Gomis.
It was goalless for much of the game until the 87th minute when Gomis broke the deadlock after a cross from Jefferson Montero.
Swansea move to eighth position in the Premier League.
It's level at Villa Park this afternoon as Swansea take on Aston Villa in the Premier League.
After a goalless first half for both teams, the Swans eventually lost 1-0 after Jordan Henderson managed to score a goal for Liverpool in the second half.
57: Scrappy beginning to the second half here, both teams struggling to keep the ball for long periods (0-0). #SWALIV
Liverpool ensured they are right in the mix for a top four position after a slice of luck saw them beat Swansea at the Liberty StadiumRead the full story ›
It's half time at the Liberty Stadium and both teams are yet to score in the Premier League match.
Bafetimbi Gomis' fortune in front of goal might just have changed for the better, according to Swansea manager Garry Monk.Read the full story ›
Swansea City manager Garry Monk admits he was frustrated that his side didn't pick up all three points against Sunderland.
The Swans went a goal down to the visitors to the Liberty Stadium thanks to a first half Jermain Defoe strike.
But despite Ki Sung-yueng's equaliser after the break, Monk thought his side deserved more than a point.
We got a good equaliser from Ki and we tried to push to get the second but it just wasn't meant to be today and sometimes that happens. We had enough chances to score at least two or three goals today but it didn't want to go in the back of the net unfortunately.