Waitakere threw caution to the win in the final stages, pushing centre back Luke Adams forward and leaving, at times, just two defenders at the back. It was a nervous finish to extra time for Canterbury as Waitakere pressed hard for an equaliser to take the game to penalties.
"In the final ten minutes we don't do what's expected at senior level because they are youth players but I guess that makes it exciting," Walker said.
In squaring the ledger with Waitakere at two titles apiece after four finals between the pair, Walker said his team had even exceeded his own expectations.
"I'm really proud of these lads. Having been in the final a couple of times the best I thought we could do this year was make the semi-finals but these lads have worked hard and over-performed. I'm so chuffed with them. They deserve it."
Waitakere United 1 (Roussin Nkoy 16) Canterbury United 2 (Anthony Cibilich 27, Rian Hooper 102). HT: 1-1. FT: 1-1.