World number one Aryna Sabalenka and second-ranked Coco Gauff were sent crashing out of the ATP-WTA Cincinnati Open on Friday as Carlos Alcaraz fought off a fierce challenge from Andrey Rublev to reach the semi-finals.
Top seed and defending champion Sabalenka had no answer for Elena Rybakina, falling to the 2022 Wimbledon champion 6-1, 6-4.
Reigning French Open champion Gauff had 16 double faults in a 2-6, 6-4, 6-3 exit at the hands of seventh-seeded Italian Jasmine Paolini.
Spain's second-ranked Alcaraz had his difficulties, but he broke Rublev in the final game of a tense duel to emerge a 6-3, 4-6, 7-5 winner and will face third-seeded Alexander Zverev, who brought fifth-seeded Toronto champion Ben Shelton's run to an end with a 6-2, 6-2 victory.
Zverev earned a 4-1 lead in the seco