Jockey Jason Maskiell faces up to six weeks out of the saddle because of an injury sustained in a trackwork fall.
Maskiell was taken to the Alfred Hospital after he was dislodged at Pakenham on Tuesday morning.
He complained of sore ribs and later confirmed via social media that he had suffered a collapsed lung.
"Unfortunately had a tumble today at Pakenham," Maskiell posted.
“Nothing broken which is good but have a collapsed lung. Roughly six weeks out at this stage.
"Thank you to all the staff & medical team. I appreciate it. Also thank you to my boss Dan for coming in to see me."
Maskiell has ridden 33 winners this season, the most recent coming at Moe last Friday.
