America's Cup champion Alinghi grabbed a share of the lead in Act 10 of the Louis Vuitton Cup challenger trials by beating Team Shosholoza and BMW Oracle Racing on the fifth day on Monday.
Alinghi was tied for first with Emirates Team New Zealand and Luna Rossa of Italy.
Alinghi won both of its races by 21 seconds, and ended BMW Oracle's unbeaten run.
The US yacht earlier beat last-placed China Team by 4:38 to sit fourth in the standings after the three leaders.
BMW Oracle Racing and Italy's +39 Challenge have an extra race in hand.
Emirates Team New Zealand beat Italy's Mascalzone Latino by 32 seconds, and Spain's Desafio Espanol by 57 seconds. Luna Rossa also won its pair, against Sweden's Victory Challenge by 55 seconds, and France's Areva Challenge by 18 seconds.