Peter Burling and Blair Tuke have sewn up gold with a race to go. Photo Reuters
The Kiwi pair will head into Friday's medal race with gold already in the bag after extending their lead out to an unassailable 34 points on the final day of fleet racing.
The four-time world champions have been ruthlessly consistent in this regatta, with their worst finish of the 12 races being seventh, to ensure their rivals never really got a look-in.
German crew of Erik Heil and Thomas Ploessel are in silver medal position heading in to the final race, with Australians Nathan Outteridge and Iain Jensen - the defending Olympic champions back in third.
The 49er fleet now have a rest day tomorrow before Friday's medal race, where all Burling and Tuke have to do is show up on the course to claim the gold.
