Swansea winger Nathan Dyer is likely to be sidelined until at least mid-November after undergoing ankle surgery.
Dyer, 28, had a successful operation this week to remove extra bone that had grown on his ankle.
"The operation went well," Swansea's head of performance Richard Buchanan told the club's official website.
"The specialists are pleased with the outcome, and it is estimated that Nathan is likely to be out for between seven and nine weeks."
Dyer has made two appearances this season after being on loan at Premier League champions Leicester last term.
He agreed a new four-year Swansea contract in August.
West Ham are close to completing the signings of Swansea striker Andre Ayew and Olympiacos left-back Arthur MasuakuRead the full story ›
A note left at the scene of the tragedy where the four-year-old died said: "Go ride your train up to heaven and wait for me."Read the full story ›
Swansea forward Andre Ayew says his future depends on a summer discussion with club chairman Huw Jenkins.
Ayew was heavily linked with Sunderland during the January transfer window and there have been reports of summer interest from West Ham.
The Ghana international says he is happy at Swansea after finishing as the club's top-scorer this term with 12 goals.
But Ayew stopped short of committing himself to a second season in south Wales after scoring in Swansea's closing Premier League game, the 1-1 home draw with Manchester City on Sunday.
And, if the result of his talks with the club is a departure from Swansea, Ayew has made it clear he wishes to remain in the English top flight.
I'm happy here. If I have to stay, fine. If I have to leave, I have to leave. What is important for me is that I keep doing my work, and in football the truth of today is not the truth of tomorrow.
We'll see what's going to happen, we'll have a discussion and see the way forward. I've enjoyed the Premier League, I think it's the best league in the world. The intensity, the determination from every team. It's a league where you enjoy every game.
Every game is difficult, you can never say you've won it before you've played it. I hope to stay in the Premier League if I leave, but I'm here at the moment at Swansea.
Manchester City managed a draw at Swansea to all but confirm fourth place due to their superior goal difference over Man UtdRead the full story ›
Jamie Vardy is suspended for Leicester against Swansea after being sent off in their 2-2 draw with West Ham last weekendRead the full story ›
Swansea's press conference has been attended by first-team coach Alan Curtis and the club have confirmed that head coach Francesco Guidolin will miss Saturday's Premier League fixture against Norwich at the Liberty Stadium.
Guidolin has been in hospital with a chest infection since Wednesday that meant he missed the midweek win over Arsenal.
"He remains in a comfortable position and is making good progress, but doctors have advised that he misses this weekend's game to continue his recovery," read a statement on the club's website.
"He is expected to remain in hospital over the weekend before his release. Everyone at Swansea City continue to wish him a speedy recovery."
Arsenal's title bid suffered a major setback after they lost to struggling Swansea at the EmiratesRead the full story ›
Swansea have confirmed head coach Francesco Guidolin will not be in the dugout for Wednesday's Barclays Premier League clash at Arsenal due to health reasons.
The 60-year-old has only been in charge of the Swans for five games after replacing interim boss Alan Curtis with the south Wales outfit involved in the battle for Premier League survival.
Curtis will take charge once again while Guildolin recovers from a chest infection which has seen his admitted to hospital in London.
"Swansea City head coach Francesco Guidolin will miss tonight's Barclays Premier League fixture at Arsenal," the club announced on their website.
"Guidolin has been struggling with a chest infection for over a week and after failing to respond fully to medical treatment, was referred to a respiratory specialist at a London hospital this afternoon.
"The specialist felt that the best course of action was for Guidolin to remain in hospital for a few days to receive further treatment.
"He is in a comfortable position and is expected to recover fully in a few days. Everyone at Swansea City wishes him a speedy recovery. Alan Curtis will carry out his duties during his recovery period."