Quade Cooper has failed in his bid to have a two-week ban for an illegal tackle overturned.
The Wallabies player was cited and subsequently suspended for lifting Morne Steyn during Australia's 30-13 win over South Africa in Brisbane on Saturday.
He launched an appeal in the hope of being available for the Tri-Nations clash with New Zealand this weekend, but a judicial panel of the South Africa New Zealand and Australia Rugby (SANZAR) dismissed his case, meaning the two-week ban will stand.
"Quade Cooper's original suspension imposed by the judicial officer stands and he remains ineligible for selection for two weeks up to including Sunday 8 August 2010," a statement said.
Cooper will now miss back-to-back Tests against New Zealand in Melbourne next Saturday and in Christchurch the week after.