National Sports Institute (ISN) director general Datuk Dr Ramlan Aziz said the injury would require about three to five weeks but added that Chong Wei would need to undergo ultrasound scanning when he returns, to determine how serious the injury was.
"Based on the current situation our estimate is between three to five weeks but a more clear definition of the injury can only be determined when he undergoes tests upon his return," he said via a short message service (SMS) Tuesday.
On Sunday, defending champion Chong Wei who faced his arch rival Lin Dan of China in the All England men's singles final retired in the second set of his match citing a shoulder injury.
Dr Ramlan said Chong Wei was currently in Switzerland and being treated by a physiotherapist from ISN who accompanied the badminton team, and expected to return home on Friday.
He added that ISN would continue to monitor Chong Wei's treatment and rehabilitation process to help him recover before the Thomas Cup final scheduled in Wuhan, China from May 20-27. - Bernama