The U.S. Open semifinal between Coco Gauff and Karolina Muchova was delayed early in the second set because of a disruption by environmental activists in the Arthur Ashe Stadium stands on Thursday night.
Gauff was ahead 6-4, 1-0 when play was halted for at least 40 minutes.
Tournament referee Jake Garner came out onto the court, while security headed toward where the protesters were. They were wearing shirts that read, “End Fossil Fuels.” At least one person glued their feet to the ground, making it harder to be removed, a spokesman for the U.S. Tennis Association said.