Star Carlton forward Charlie Curnow sent for scans

The two-time Coleman medallist had been on a modified program over summer after undergoing knee and ankle surgeries in the off-season.

Curnow was only scheduled to take part in half the match simulation and looked good early, kicking a goal and marking well.

But the latest setback could put Curnow in doubt for pre-season hit-outs against St Kilda and GWS.

The Blues start the home-and-away season against Richmond on March 13.