Wallabies winger Henry Speight won't be adding a Rio de Janeiro Olympics sevens appearance to his rugby resume after being ruled out of the Australian team because of a ligament injury to his right knee.

The Australian Rugby Union on Wednesday said the Fiji-born Speight, who has played five tests and is contracted to the Canberra-based Brumbies but took time out from Super Rugby this season to push for Olympic selection, sustained the injury in a match between the Australian sevens side and a development team.

He is expected to be sidelined for up to 12 weeks. The Olympic tournament in Rio runs from Aug. 6-11.Speight played in the Dubai and Sydney tournaments during the 2015-16 World Rugby Sevens series, scoring two tries.

"We're all (upset) for Henry," Australia sevens coach Andy Friend said. "He made a commitment to the program and has done everything he possibly could to get himself in the frame for Olympic selection."

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Speight and Quade Cooper were the two highest-profile players bidding for selection in the Australian sevens team for Rio. France-based Cooper had already been ruled out.

Australia will announce its Olympic men's and women's squads on July 14. The Australian women won the world series.

- AAP