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Bill Koch

U.S. designer for Kiwis, Italy mulling result; America's Cup: Doug Peterson is not as concerned with working for foreign entrants as he is with why his latest design, Prada, was swamped by Black Magic, an improvement on his original.; SAILING

AUCKLAND, New Zealand -- Wonder why, for the first time in 149 years, there was no American boat in the America's Cup race here? Look no further than bearded, California yachting guru Doug Peterson.

Described in the official race program as "the hottest America's Cup designer," he has almost single-handedly scuttled U.S. chances in the past two Cup competitions.

First, he was a lead designer of the New Zealand boat, Black Magic, that brought the Cup to Auckland in 1995 by defeating veteran U.S. skipper Dennis Conner, 5-0, in San Diego.

To add insult to injury, he co-designed the Italian boat of Prada Challenge, Luna Rossa, which this year defeated five American...