Lymington's Sir Ben Ainslie's Land Rover BAR team hold a slender lead at the top of the standings after the opening day of racing at the America's Cup World Series in Portsmouth.

The four-time Olympic gold medallist guided his crew to victory in the first race of the day, and they followed that up with runners-up spot in the second race to sit one point above Emirates Team New Zealand in the table.

"You couldn't ask for anything better," Ainslie said. "Fantastic conditions, so many people coming out to support the teams.

"I'm so happy for Portsmouth and for our team. We have so many people on shore working on our behalf and cheering us on. For them to see this level of support is brilliant."

Racing will continue on today, with two more races and double points on offer towards qualification for the 2017 America's Cup.