Swansea have been dealt a blow with the news that Nathan Dyer could be sidelined for up to two months with an ankle injury.
The 28-year-old, who spent last season on loan at Leicester City, after seven seasons with the Welsh club, returned this season after earning a Premier League winners medal.
Dyer signed a new four-year deal with the club upon his return and will undergo surgery on Monday to remove extra bone growth in his ankle.
Speaking to the club's official website, he said: "I am bitterly disappointed.
"I was feeling good after completing pre-season training and being involved in the friendlies and the first three games of the campaign.
"I started to feel some pain in my ankle after returning from the training camp in America. I saw a specialist last week and the MRI scan revealed the extra bone growth at the back of my ankle.
"There is not a lot I can do about it, but I am determined to work even harder after my operation to play my part for the team on my return."
Swansea are, meanwhile, running the rule over 26-year-old Swedish-born centre-back Sotiris Papagiannopoulos. The Ostersunds FK defender trained with the club on Wednesday.