Climate protester glues feet to floor at U.S. Open, interrupting semifinal between Gauff, Muchova

The U.S. Open semifinal between Coco Gauff and Karolina Muchova was delayed by 50 minutes because of a disruption by environmental activists in the Arthur Ashe Stadium stands in New York City on Thursday night. One protester glued his bare feet to the concrete floor.

Gauff was ahead 6-4, 1-0 when play was halted early in the second set.

Security guards and, later, more than a half-dozen police officers went over to confront the three protesters, who were wearing shirts that read, "End Fossil Fuels." Two of the activists were escorted out within several minutes, but it took longer to remove the person who stuck his feet to the ground.

Spectators were asked to move away to clear a path for the police, who were cheered by fans sitting near the section where the disruption happened.

Gauff sat on her sideline bench for a bit during the break in the match, eating fruit out of a plastic container, before then getting some tennis balls and hitting a few practice serves. Muchova was briefly visited by a trainer during the interruption.

Later, both players headed toward the locker room as the delay continued. Gauff sat on a treadmill, a towel draped over her lap, while chatting with members of her team.

It is the latest in a recent series of protests at sporting events — and tennis, in particular — related to the use of fossil fuels.

At Wimbledon in July, two matches were interrupted when environmental activists jumped out of the stands at Court 18 and scattered orange confetti on the grass.

Gauff, a 19-year-old American, and Muchova, a 27-year-old from the Czech Republic, were both playing in the semifinals at Flushing Meadows for the first time.

Their match was the first of the evening. The other women's semifinal, between Aryna