Mexico’s Renata Zarazua scores U.S. Open upset over American Madison Keys

Renata Zarazua, of Mexico, reacts after defeating Madison Keys, of the United States, during the first round of the U.S. Open on Monday in New York.

Pretty much from the get-go at the U.S. Open on Monday, Madison Keys could tell she wasn’t hitting the ball well or feeling very much at all like the self-confident player who claimed her first Grand Slam title at the Australian Open in January.

After 89 unforced errors, including 14 double-faults, the No. 6-seeded Keys was gone from Flushing Meadows in the first round with a 6-7 (10), 7-6 (3), 7-5 loss to 82nd-ranked Renata Zarazua of Mexico.

“For the first time in a while ... my nerves really got the better of me, and it kind of became a little bit paralyzing,” said Keys, the runner-up in New York to good friend Sloane Stephens in 2017 an