Organisers have been forced to delay the start of the Louis Vuitton Cup for the fourth day running because of light winds off the coast of Valencia.
Alinghi dominated the recent America's Cup warm-up series
The postponed round-robin races will spill into reserve days next week.
Three flights a day will be raced in the second round-robin stage if weather continues to be unsuitable.
The two-month long competition features 11 yachts and will determine who challenges reigning America's Cup champion Alinghi of Switzerland.
One team benefiting from the layoff is Italy's +39 Challenge, which has nearly completed repair work on its broken mast.
The mast snapped after a collision with United Internet Team Germany in the third fleet race of the final warm-up regatta - Act 13 - earlier this month.
The Italians have since been using one of Alinghi's previous masts.