Serena Williams' bid to reach the US Open final was put on hold as the women's semi-finals were rescheduled due to rain.
The forecast predicted rain at Flushing Meadows throughout Thursday evening and both matches will now be this afternoon, with play starting at 1600 (Irish time).
The men's semi-finals, also scheduled for later today, will begin at 2200 (Irish time).
Williams takes on unseeded Italian Roberta Vinci and number two seed Simona Halep plays another Italian Flavia Pennetta.
In the men's draw, Novak Djokovic faces defending champion Marin Cilic while Roger Federer is up against fellow Swiss Stan Wawrinka.
