The Plus500 Brumbies can confirm that young flyhalf Noah Lolesio's hamstring injury will rule him out for eight weeks.
The 20-year-old suffered the injury in the first half of the side's win over the Waratahs in Sydney on Saturday night.
The club are hopeful he will return in time for the Vodafone Super Rugby AU finals.
Plus500 Brumbies coach Dan McKellar said: "We're really disappointed for Noah, he had a good start to the year and was really enjoying his footy."
"We've got a very good medical team here who will make sure Noah gets the best possible treatment and rehabilitation to ensure he gets back out on the field as soon as possible.
"Whilst we are all disappointed for Noah we've got full confidence in Bayley Kuenzle and Reesjan Pasitoa to step in and fill that role."