Australia's world netball title defence has suffered another setback with midcourter Lauren Nourse ruled out with a knee injury.
The Queensland Firebirds centre joins skipper Sharelle McMahon in being sidelined for the July tournament in Singapore, after suffering ligament damage during a trans-Tasman competition match.
McMahon underwent surgery on a ruptured achilles tendon earlier this month, with Australian Netball this week announcing Natalie von Bertouch as the new captain.