On her second appearance in Auckland, Wozniacki has a lot to live up to.
In each of the last two years the marquee players have lifted the trophy (Ana Ivanovic and Agnieszka Radwanska) and Wozniacki fits that bill this year. She spent 67 weeks on top of the tennis world in 2010 and 2011, before a freefall left her outside the top 10 for extended periods.
There was a resurgence in the second half of 2014, capped by a run to the US Open final where she was only stopped by Serena Williams.
She might lack the power of some but defensively is without peer.
Wozniacki moves like a leopard along the baseline and her positioning allows winners to be hit where other players have to settle for a retrieval.
The Dane wants to add a more attacking side to her game - and there were signs last night - as she went for winners earlier in the rallies.
Today she will face wild card Taylor Townsend in a terrific match up of styles, though the American will struggle to contend with Wozniacki's accuracy.
Meanwhile, the upsets continued on day two, with Czech qualifier Lucie Hradecka recovering from a set down to dispatch Svetlana Kuznetsova 3-6 7-6 6-4.
Julia Goerges of Germany, Belgian Kirsten Flipkens and Elena Vesnina of Russia were among the other first round winners yesterday.