Rabbitohs captain Roy Asotasi has undergone hand surgery following an injury suffered in Friday night's victory over the Cronulla-Sutherland Sharks.

X-rays and an MRI scan determined that Asotasi had dislocated bones in his hand that make up the wrist, which required an operation to repair the damage.

The operation has been completed and Asotasi will be sidelined for up to four months.