This was Leylah Fernandez's second straight upset and her second straight win over a former U.S. Open champion. Geoff Burke-USA TODAY Sports

Leylah Fernandez is making major noise at the U.S. Open this year, proving that her third-round win was not a fluke.

On Sunday, Fernandez defeated Angelique Kerber in three sets to reach the quarterfinals at Flushing Meadows. Fernandez dropped the first set 4-6 and rallied to win the next two 7-6, 6-2.

This was Fernandez’s second straight upset and her second straight win over a former U.S. Open champion. She beat Naomi Osaka on Friday night, also coming back from down a set to win.

The 18-year-old tricky lefty won 66 percent of her first serve points and took 76 percent of her net points.

Fernandez reached a Grand Slam quarter for the first time in her career and was pumped up afterward:

Fernandez will face Elina Svitolina in the quarterfinals.

Patrick Mouratoglou, the coach for Serena Williams and Stefanos Tsitsipas, added his commentary regarding what makes Fernandez so good.

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