Carlton forward Charlie Curnow faces a significantly disrupted pre-season after fracturing his patella in an accident unrelated to football.
The star Blue will undergo surgery on Thursday after the injury mishap caused by slipping on tiles on Wednesday.
Carlton said that while the injury happened to the same knee on which he had surgery in the post-season, the fractured patella was a new complaint.
“When Curnow slipped, he produced a high-level contraction to his quadriceps muscle. This caused a large force to go through his whole knee and his de-conditioned patella did not tolerate the load,” the Blues said in a statement.