Guttenbeil ruled out for a month

The New Zealand Warriors have lost second rower Awen Guttenbeil for at least a month ahead of Saturday's National Rugby League match against Manly at Brookvale Oval.

Guttenbeil was today ruled out for four to six weeks with a knee injury sustained in Sunday's 24-20 win over the Bulldogs. Wairangi Koopu will replace him in the only change to the Warriors' starting 13.