Coco Gauff becomes first American teen to reach U.S. Open semifinals since Serena Williams

Coco Gauff dealt just fine with the heat, the humidity, her big-hitting opponent and the task of trying to reach the U.S. Open semifinals for the first time, defeating 2017 French Open champion Jelena Ostapenko 6-0, 6-2 on Tuesday.

Gauff, a 19-year-old from Florida, is the first American teenager to reach the final four at Flushing Meadows since Serena Williams was the runner-up to her older sister, Venus, in 2001.

"Last year, I lost in the quarterfinal stage, and I wanted to do better this year," Gauff said. "Still have a long way to go, but I'm happy and I'm ready to get back to work for the next one."