The phrase "allegedly sustained" is correct and usable in written English.
It can be used when discussing claims or reports about injuries or damages that are not yet verified or confirmed.
Example: "The athlete allegedly sustained an injury during the match, but further tests are needed to confirm the extent of the damage."
Alternatives: "reportedly sustained" or "purportedly sustained".
Under similar allegations, Jennifer sued for harms allegedly sustained by her as a result of her mother's injuries.
See article.Six police officers in Baltimore were charged over the death of Freddie Gray, who died from spinal-cord injuries he allegedly sustained in a police van.
Dr. Smith said he recalled cases in which family members trying to see patients brought in for injuries allegedly sustained in falls turned out to have assaulted them.
The plaintiff, Eleanore Keen, filed suit against the defendant, Dominick's Finer Foods, Inc., seeking to recover for injuries allegedly sustained while using a shopping cart in a Dominick's store located in Highland Park, Illinois.
Minnesota Vikings' running back Adrian Peterson is in mourning following the death of his two-year-old son, from injuries allegedly sustained during an aggravated assault according to reports in America.
Gray was arrested on 12 April and died a week later of a spinal injury he allegedly sustained either while being arrested or while being transported in the police van.
National Hispanic Civil Rights Groups are joining a global boycott against the Hyatt hotels for allegedly sustaining harmful working conditions for their staff, especially housekeepers, who according to the activists are predominantly women of color and Latinas.
A detainee was allegedly assaulted, sustaining head injuries, but a Sydney-based lawyer has said no one called an ambulance.
Champion collapsed on a chartered bus outside the team's Orlando hotel and died Nov. 19, allegedly from injuries sustained during a hazing ritual.
Saleh, who has been in power since 1978, spent several days in hospital last week, allegedly being treated for bruises sustained while "practicising his favourite sport".
(Gray was not wearing a seatbelt while he was transported in shackles to the police station. He allegedly died of spine injuries sustained while he was in the van).
