Webb added that his team "had to work on not panicking when things aren't quite going our way; if we can keep knocking the ball around, then the result will come".
Nink scored his second goal early in the second half before both teams started to tire, a trait Webb admits his side needs to rectify before finals.
In the other premier men's match, Mangapai beat Bream Bay United 8-2 and will take on Maungakaramea next week for a place in the final.
In the premier women's competition, top of the table Old Girls beat Mangapai 5-0 after being 0-all at halftime while Maungakaramea beat Hikurangi 3-0.
Despite a frantic finish, second and third placed sides Whangarei Girls' High School and Springfield battled out a 2-all draw.