Ben Ainslie in surprise defeat at America's Cup World Series in Naples It was a surprise then to see Ainslie so comprehensively beaten by Slingsby and will inevitably call into question the rankings at Oracle with the Australian likely to be given more responsibilities and opportunities as a tune up skipper. With AC45s now consigned to the scrapheap with no other events scheduled following the cancellation of three other AC45 regattas, there will be no more opportunities for Ainslie to claw back any ground against Slingsby on the race track ahead of the America's Cup finals in September. Ainslie's crew went into the final day in third place overall in the fleet racing, trailing leaders Emirates Team New Zealand by eight points and second placed Slingsby by three but the scoring was so close that any one of five teams could have won the Naples title. "Yesterday was not so good, today had better be an improvement!," Ainslie tweeted shortly before the start. But it wasn't to be and JP Morgan BAR struggled in the middle of the fleet. "To win the event we really needed to win the race today, unfortunately it didn't happen for us," Ainslie said. We struggled in the middle of the fleet. The conditions were difficult today but it was the same for everyone and we just weren't able to quite get it right which is a shame and it's frustrating for the team. But that's sports, that's life and you have to learn what you can from it and move forwards. I think we had more potential than where we finished, so we know we have to work harder next time round to get ourselves to the top of the fleet at the next event. Among the winning crew on Luna Rossa Swordfish was British bowman Paul Campbell-James who is in the squad for Luna Rossa's AC72 campaign in the Louis Vuitton Challenger finals starting in July. The Italian AC72 is set to be helmed by British Olympic sailor Chris Draper who finished fourth in Naples with his mainly British crew of David Carr, Alister Richardson and Nick Hutton.