Fernando Llorente will sit out Swansea's summer tour of the United States and is in danger of missing the start of the Premier League season.
Spain striker Llorente suffered a broken arm in a cycling accident on a family holiday in Italy last month.
Swansea head out to America on Thursday for a three-game tour, but Llorente will remain in Wales and continue his rehabilitation at the club's Fairwood training base.
'This is a period where we have to be very careful that Fernando is not moving the arm,' Swansea head coach Paul Clement told the official club website.