Karolina Pliskova Beats Serena Williams at U.S. Open

Nothing lasts forever, namely Serena's No. 1 reign.

At USA Today, "Serena Williams stunned by Karolina Pliskova in U.S. Open semifinals."

And at WaPo, "Serena Williams loses in U.S. Open semis for 2nd year in row."

Karolina Pliskova: 4th woman to defeat both Williams sisters in the same Grand Slam with a 6-2, 7-6 win over Serena. pic.twitter.com/tfiGhSdm7i

— ESPN Stats & Info (@ESPNStatsInfo) September 9, 2016