Hunter Clark is set to undergo surgery after sustaining a shoulder injury in last night’s AAMI Community Series game against Essendon.

Scans this morning confirmed a high-grade AC sprain to the 22-year-old’s right shoulder.

Clark will be joined on the sidelines by fellow midfielder, Jack Billings, who left the field with a hamstring complaint.

“Hunter and Jack will both miss at least a month of football,” Chief Operating Officer Simon Lethlean said.

“For Hunter, it could be up to six weeks, we’ll just have to see how quickly he comes back after surgery.

“Injuries at this time of year are disappointing, but it’s a long season and we will give Hunter and Jack the time they require to get back to their best.”