In the ICC Cricket World Cup, Australia were 51 for 1 in 6 overs against co-hosts New Zealand in a crucial Pool-A game at Auckland, when reports last came in. Aussie skipper Michael Clarke had won the toss and opted to bat first. Clarke returned to the squad today following a hamstring injury to replace George Bailey. The New Zealand side is unchanged.The Kiwis are presently in an excellent form as they have won all of their three matches against Sri Lanka, England and Scotland.The Aussies, also, are yet to see a defeat in this competition, so far. They have played two games, with one ending in their favour and the other being washed out.