NEW YORK -- A year after she was stunned here in a US Open semifinal, it happened again to Serena Williams.
This time the upset was crafted by No. 10 seed Karolina Pliskova, a hard-hitting 24-year-old from the Czech Republic, who ended Williams' most recent run at history 6-2, 7-6 (5).
While the 34-year-old Williams is acknowledged to have the greatest serve ever in the women's game, it was only the second best on display Thursday night at Arthur Ashe Stadium.
Pliskova, the No. 10 seed, had seven aces and won 84 percent of her first-serve points.