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.
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.