The world No. 1 was thrown off by Siegemund's changes in pace and rhythm, but came through in three tight, tense sets.

Sabalenka, the top seed at the Wimbledon Championships, was upset by No. 13 Amanda Anisimova in three sets on Thursday, and in the midst of their battle, Sabalenka apparently didn't love something the American pulled. In the second set, Anisimova, of the United States, celebrated a point before the ball went by Sabalenka.

Aryna Sabalenka’s Gesture with Amanda Anisimova at Wimbledon Is Turning Heads originally appeared on Athlon Sports. Tennis has its traditions. Some are sweet. Some are ridiculous. Thursday’s Wimbledon semifinal reminded us of both, and one awkward moment no one can stop talking about.