Prior to the 2017 America's Cup, several of the competing syndicates signed an agreement to hold World Series prior to the next two America's Cups, then scheduled for 2019 and 2021. These two World Series would be used as selection series to determine which teams would compete at the 2019 and 2021 Louis Vuitton Cups Challenger Selection Series. These two seasons would have used the AC50-class yachts, instead of the AC45 or AC45F classes. However, the winner of the 35th America's Cup, Emirates Team New Zealand was not a signatory to the agreement for the 36th and 37th America's Cup, making these plans obsolete.