Raducanu, 23, is currently undergoing rehabilitation for the injury, with the US Open's main draw due to kick off in four weeks.
Reuters has reached out to the Briton's representatives for comment.
Raducanu has struggled with injuries and illness throughout this year, with a right foot injury she suffered last year affecting her early season preparations and campaign.
An illness in February forced her out again for more than two months, and in June she picked up the stress fracture that forced her out of Wimbledon.