New Zealand has taken a commanding 4-0 lead over Britain in their America's Cup defence, with the series being a first-to-seven-wins competition. The Kiwis' AC75 monohull, 'Taihoro,' displayed superior performance and speed, securing wins despite close races and a controversial umpire decision against the British team. Ben Ainslie's British team remains optimistic, despite setbacks including penalties and a near-collision incident, emphasizing the need to improve and stay competitive. The series continues with New Zealand needing three more victories to retain the title, while Britain is determined to close the performance gap and make a comeback. The competition highlights New Zealand's attempt to secure the Auld Mug for a third consecutive time, a trophy Britain has never won in its 173-year history.