Sam Overall forced to the sidelines

South Adelaide key forward Sam Overall is expected to see an extended period on the sidelines after injuring his foot against Central District in Round 6.

Scans yesterday revealed Overall has suffered an injury to the Lisfranc ligament in his right foot.

The injury was sustained during a contest for a loose ball which saw both Centrals Nicholas Madden and teammate Anthony Biemans land awkwardly on the 22-year-old's foot.

It is expected that Overall will be sidelined for 8-10 weeks. 

Further consultation with a specialist will be made this week to see if the injury requires surgery.