SAN FRANCISCO -- Three races down Friday, one more to go Saturday for Italy's Luna Rossa to clinch the Louis Vuitton Cup semifinals against Sweden's Artemis Racing and face powerhouse Emirates Team New Zealand in the finals. The America's Cup challenger race was the best so far for both teams -- each improving their maneuvers and speed -- but Luna Rossa had a perfect start and was the clear winner, beating Artemis by 1 minute, 18 seconds. Crowds lining five deep along Piers 27/29 cheered as they watched the finish. "I'm proud of how we sailed today," Luna Rossa skipper Chris Draper said after the race. "We're only going to get better."