“For the first time in a while, my nerves really got the better of me, and it kind of became a little bit paralyzing,” Keys said after the match. “I felt like I was just slow. I wasn’t seeing things the way that I wanted to, which I feel like resulted in a lot of bad decisions and lazy footwork.”

Madison Keys admitted nerves "paralyzed" her in New York as she suffered an unexpected US Open first-round defeat to unseeded Renata Zarazua.