Australian Open champion Madison Keys is upset in US Open’s first round by Mexico’s Renata Zarazua of Mexico

Australian Open champion Madison Keys was undone by 89 unforced errors and was upset in the first round of the U.S. Open by Mexico’s Renata Zarazua on Monday.

​ Australian Open champion Madison Keys was undone by 89 unforced errors and was upset in the first round of the U.S. Open by Mexico’s Renata Zarazua on Monday. Read More Breaking News, Latest News and Videos | CNN