U.S. Open 2018: World No. 202 stuns Garbine Muguruza

GarbineMuguruza - Cropped
Spain’s Garbine Muguruza (Getty Images)

Qualifier Karolina Muchova knocked out two-time Grand Slam champion Garbine Muguruza in a second-round shocker at the U.S. Open.

Muchova, a 22-year-old Czech who came through qualifying in New York, downed Muguruza, 3-6, 6-4, 6-4, in the second round.

Playing in the main draw of a Grand Slam for the first time, Muchova completed her victory just after 1 a.m. local time Thursday.

Muchova, the world No. 202, held her nerve in the third set, hitting 14 winners and just 11 unforced errors.

The loss marked two-time Grand Slam champion Muguruza’s third second-round exit at majors this year.