Madison Keys of the United States advanced to the quarterfinals of the German Open on Wednesday by defeating top-seeded Aryna Sabalenka 6-4, 1-6, 7-5.
Keys, who is ranked 28th in the world, hit eight aces and beat the world No. 4 in under two hours. It’s her fourth career win over a Top 5 opponent and the first time she is advanced to the quarterfinals of a WTA event since finishing runner-up in Brisbane in January 2020.
The 26-year-old Keys is attempting to capture her third singles title on grass, following victories in Eastbourne in 2014 and Birmingham two years later. On Thursday, Keys will face Veronika Kudermetova or qualifier Ludmilla Samsonova in an all-Russian match.
The lone seeded player to win at the Wimbledon warm-up on Wednesday was Switzerland’s Belinda Bencic. Petra Martic was defeated 6-3, 6-4 by the Swiss player.
When Bencic collapsed, she returned a volley while still on the ground and then stood up to put away a backhand winner, probably the shot of the tournament.
Bencic will face Ekaterina Alexandrova, who defeated Ukraine’s second-seeded Elina Svitolina 6-4, 7-5. In the second set, the Russian player saved seven set points. Alize Cornet shocked the world by very quickly defeating third-seeded Bianca Andreescu 7-6 (2), 7-5 in just over two hours.