Alex Porter's injuries are worse the expected, meaning the star team pursuiter has plenty to overcome before the world track cycling championships.
While Porter remains hospitalised in Melbourne after his crash at the national titles, sprinter Stephanie Morton has won again at the track World Cup round in London.
Morton qualified fastest in the sprint on the way to beating German Emma Hinze two heats to nil in the gold medal ride-off.
She also won the sprint earlier this month at the Berlin World Cup round.
Porter and Morton are two key members of the Australian track squad in the build-up to the Tokyo Olympics.
Their immediate priority is the February world championships in Poland.
Porter has the starter role in the team pursuit squad. He was part of the quartet who broke the world record in April at the Commonwealth Games.
He suffered his injuries on Saturday night in a crash during the madison at Melbourne Arena.
The initial news was that Porter had broken his collarbone, but he also has six cracked ribs and a lung puncture.
While Australian track endurance coach Tim Decker has stressed the punctured lung is minor, the injury complicates Porter's recovery because his collarbone surgery is delayed.
"We have to wait for the little air bubble in the punctured lung to heal - that could be anywhere up to seven days," Decker told AAP.
"If it was just as simple as the broken collarbone, we'd be on it within a week.
"But it's added a couple of complications."
Porter cannot fly for six weeks and, once he leaves hospital in the next couple of days, he will be driven back to the squad's Adelaide base.
Decker says it is too early to say when Porter will return to training, but hopes it is no longer than two-and-a-half weeks.
"If he can get back on the ergo with eight weeks to go, we're definitely in the hunt," Decker said.
"He's in good spirits - this is a bit of challenge for him, to try to make it to worlds.
"I'm not overly stressed because it's 73 days (to the world titles) - a lot can happen in that time."
Decker also said the squad had the depth to cover for Porter, nominating Sam Welsford, Kelland O'Brien and Cameron Scott as riders who could take the starter's role if necessary.
Australian Associated Press