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Ben Ainslie's Great Britain were knocked out of the America's Cup by New Zealand, who ditched conventional arm-grinders to use pedal grinders. Could Britain adopt the same approach in the future? If so, could recently-retired Sir Bradley Wiggins be asked to help? One of the team's grinders, Matt Cornwell, reveals his thoughts to Sportshour's Caroline Barker... Picture credit: Bradley Wiggins (Getty Images)