World Cup 2010: Group F (Italy, Paraguay, NEW ZEALAND, Slovakia)
15 June 2010: NZ vs. Slovakia
20 June 2010: Italy vs. NZ
24 June 2010: Paraguay vs. NZ
I think if New Zealand is to have any hope of getting out of the group a win against Slovakia is essential. It'll be a big ask though as they topped their European qualification group over Slovenia and the Czech Republic.
That friendly against Italy back in June resulted in a close 4-3 win for Italy, although admittedly they didn't play many of their regular starters in the game. I think it's fairly unlikely NZ will take anything from this match.
Paraguay finished third in South American qualification (level on points with second placed Chile, and one point behind table toppers Brazil) and had some noteable results along the way (including a 2-0 victory over Brazil, and a 1-0 win against Argentina). Hmm...tough match.