(Photo credit: Robert Deutsch-USA TODAY Sports)
Naomi Osaka, trailing by a set, squandered three sets points that would have leveled her match and crashed out of the U.S. Open in the second round on Thursday in New York.
The Czech Republic's Karolina Muchova beat Osaka, a two-time U.S. Open champion, 6-3, 7-6 (5).
In terms of rankings, thematch doesn't qualify as an upset, as Muchova is No. 52 in the world and Osaka is
