Britain won a second race in their head-to-head America's Cup final against New Zealand on Wednesday, reducing the holders' lead to 4-2 in the first-to-seven points series in testing sea conditions off Barcelona.

INEOS Britannia has gotten the break it needed and won its first race over Emirates Team New Zealand in the America’s Cup finals.

The comeback is on,” declared Ben Ainslie after Ineos Britannia took their first race wins of the 37th America’s Cup match to move from 4-0 to 4-2 down against Emirates Team New Zealand, halving their deficit in the first-to-seven series.

New Zealand took a 4-0 lead in their America's Cup defence on Monday, getting the better of the British challenger in a tight early tacking duel and then managing to control the race.

Emirates Team New Zealand has taken another step toward retaining the America’s Cup after making it 4-0 over INEOS Britannia.

The 37th America’s Cup final between the Challenger, INEOS Britannia, and the Defender, Emirates Team New Zealand, is currently underway and revealing a few tactical trends over four races thus far. Let’s take a look at the key decisions teams must make and which strategies are being employed to attack from behind or defend when leading.

Follow today’s action from Barcelona as Great Britain look to make up ground on New Zealand in races five and six

INEOS Britannia has scored its first two victories over Emirates Team New Zealand in the America’s Cup finals and now trails the first-to-seven wins 4-2. New Zealand’s Taihoro fell off its foils and was far behind at the start of Race 5.