NEW YORK :American Jessica Pegula rode her roller-coaster season to reach a second straight U.S. Open semi-final on Tuesday, with a clinical 6-3 6-3 win over twice Grand Slam champion Barbora Krejcikova.

Fourth-ranked Pegula had a dreadful run-up to the year's final major but has flipped the script and found another gear in New York, where she has yet to drop a set.

"I just surprised myself," said Pegula, who exited early from Cincinnati, Montreal and Washington, and had despaired over her form during practice in the days leading up to the singles main draw.

"I'll always back myself and figure things out in the end instead of kind of spiraling and letting it go too far."

Subscribe to CNA's Recommended Read A single handpicked story that we think you shouldn't miss. Just one a day.

See Full Page