"All the players have really stepped it up a notch in the past few days and trained really well making this a very difficult team to pick.
"We love the support we get here in Wellington and this tournament is always one of the highlights on the sevens world series, but this also makes it one of the toughest to win," Tietjens said.
Fiji and New Zealand are joint top of the world series with 51 points from three events.
TIETJENS' PICKS
2012 New Zealand sevens squad: Toby Arnold (Bay of Plenty), Tomasi Cama (Manawatu), DJ Forbes (Counties Manukau), Hosea Gear (Wellington), Frank Halai (Waikato), Bryce Heem (Auckland), Mark Jackman (Hawkes Bay), Solomon King (North Harbour), Tim Mikkelson (Waikato), Charles Piutau (Auckland), Lote Raikabula (Wellington), Ardie Savea (Wellington).