Australian Jeffrey Guan, considered to be a potential star, was struck in the eye by an errant tee shot from a pro-am participant, reportedly resulting in multiple fractures to his eye socket, according to a report from Brad Clifton in Australian Golf Digest.

Guan, 20, who missed the cut in his PGA Tour debut at the Procore Championship last week, was injured at an NSW Open regional qualifier event at Catalina Club Batemans Bay on Friday. Paramedics onsite treated him before he was transported to Canberra for emergency surgery. He “was at serious risk of permanent damage to his eyesight,” Clifton reported.

“Obviously there are fears he may lose some vision but we won’t know the full extent until he goes to Sydney for further assessment,” Paul Davis, Guan’s coach and mentor, told Australian Golf Digest. “It’s truly awful … this was actually the first pro-am Jeff has ever played in. It’s just the worst possible news after such an amazing week in California.”

This article was originally published on golfdigest.com