PORT ADELAIDE forward Robbie Gray will undergo surgery on Sunday after suffering a broken hand in the Power’s win over North Melbourne on Friday night.

The injury happened in the first quarter of the 16-point victory.

The 31-year-old saw out the remainder of the match, finishing with 18 disposals and six marks.

Scans have confirmed the need for surgery to repair the break.

Gray is expected to be sidelined for the next month.