Wesley Sulzberger has been called up to the Australian cycling team for Sunday's men's road race at the world titles in the Netherlands.
He has replaced triple world time trial champion Michael Rogers in the nine-man team for the gruelling 267km race through the hilly Limburg region from Maastricht to Valkenburg.
Rogers succumbed to a bout of tonsilitis.
"It's always a blow to lose a rider of the calibre of Michael Rogers from a national team," said national performance director Kevin Tabotta.
"Michael adds so much value physically and tactically to our worlds teams.
"This season has been one of his best and his experience will be missed on Sunday."
It will be Sulzberger's fourth appearance at a road world championships. He was a member of the team that supported Cadel Evans when he won the world title in Switzerland in 2009.