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

Aryna Sabalenka throttled the net with her tennis racket during a tense deciding set against Laura Siegemund. Women's No.1 Sabalenka was put under serious pressure by the massive underdog, and her emotions began to get the better of her as the match wore on.

Aryna Sabalenka battles from set down to beat unseeded German Laura Siegemund in two-hour-and-54-minute match; she meets 13th-seeded American Anisimova in semi-finals; Follow scores, reports and our d