"Super Saturday" is history at the US Open but rain has created a "Fantastic Friday" at Arthur Ashe Stadium with Serena Williams, Novak Djokovic and Roger Federer in starring roles.

Showers postponed Thursday's scheduled women's semi-finals to Friday, US Tennis Association officials moving them ahead of the men's semi-finals to create a day of high drama on the biggest stage in tennis as Williams chases history, Federer seeks his first Slam title since 2012 and Djokovic seeks his third Slam of 2015.

It comes in the first year since organizers scrapped the old "Super Saturday" schedule of men's semi-finals and women's final in one day in favor of a regular Grand Slam format, giving players a day off before their semi-final and final, weather permitting.

But this year, the last year the US Open will be played without a retractable roof over Arthur Ashe Stadium, fates have tossed together four matches in a rare Friday spectacle.