Australian Olympic BMX cycling hopeful Kai Sakakibara is in a medically-induced coma in Canberra Hospital after sustaining serious head injuries in a race accident.
The 23-year-old underwent surgery on Sunday morning to relieve pressure on his brain following the Saturday crash.
Sakakibara is in a critical but stable condition and is expected to remain in a coma for the next two weeks.
Sakakibara has been ranked among the world's top 10 riders in recent years.
The Olympics Opening Ceremony is July 24 in Tokyo.