For Serena Williams, the wait for Grand Slam title No. 23 will have to wait until next year.
Williams was upset in the U.S. Open semifinals on Thursday night by Karolina Pliskova, who earned a 6-2, 7-6(5) victory at Arthur Ashe Stadium.
Pliskova, the No. 10 seed, hadn't advanced past the third round of a Slam prior to this year's U.S. Open, where the Czech Republic native has earned victories over both Williams sisters en route to the final.
Williams's defeat also means that she will lose her No. 1 ranking, which she has held for more 183 consecutive weeks.