Nielsen is set to play for the first time since being forced off the field with a rib injury early in the sixth-round encounter with Canberra on April 13.
And Locke makes his comeback from a back injury suffered the last time the Vodafone Warriors played at Mount Smart Stadium when they beat Gold Coast 25-24 on May 5.
While they return loose forward Todd Lowrie hasnt recovered from the rib injury he picked up in last Saturday nights loss to Penrith. Its hoped hell be back for the away clash against Brisbane on June 3.
Carlos Tuimavave returns in the centres to replace Ben Henry, who suffered a season-ending knee injury at training on Thursday night.
Elijah Taylor will start at loose forward in Lowries absence.
The full playing 17 will be confirmed an hour before kick-off tomorrow.
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