Dylan Walker will spend up to a month on the sidelines after he injured his right hand while punching a wooden door to his apartment.

The Manly centre has also been fined $10,000 and handed a breach notice for the alcohol-fuelled incident after he met with the NRL club on Monday morning.

Walker, who was last week dropped from the NSW State of Origin team, had been out drinking with teammates on Saturday night during the club’s bye weekend.