It’s the first time that’s happened at Flushing Meadows since 1981. It hasn’t happened at any Grand Slam tournament since Wimbledon in 1985.

No. 9-seeded Venus Williams will play unseeded Sloane Stephens in the first semifinal Thursday night. That will be followed by No. 15 Madison Keys against No. 20 CoCo Vandeweghe.

The 37-year-old Williams is the only member of the quartet who has participated in a Grand Slam singles final. She owns seven major championships, two at the U.S. Open in 2000 and 2001.