Chris McDonald
Challenge Wanaka race director Victoria Murray-Orr said McDonald was a "last-minute" withdrawal from the 2010 event and would not defend the title and race record, which he set last year.
Murray-Orr said she did not know why McDonald had decided not to enter.
The big Australian was a popular winner last year on his way to setting a race record of 8hr 37min 41sec.
United States triathlete Justin Dearr, a long-time training companion of McDonald, said his friend was taking time out from the sport to allow himself recovery time after he found himself struggling with his training requirements.











