Wallabies centre Matt Toomua is in doubt for the England Test series in June after he underwent surgery on his injured knee.
Toomua will miss up to six weeks with Brumbies assistant coach Dan McKellar confirming the news before their 23-6 win over the Bulls in Canberra.
The 31-year-old injured his knee during the Brumbies loss to the Highlanders in Invercargill last weekend.
The loss is a cruel blow to Stephen Larkham's side, with the Brumbies in a tight race with the Rebels and Waratahs for top spot of the Australia conference.
The injury is also blow for the Wallabies with Toomua likely to miss at least the opening Test of the England series.