Maria sakkari

Aryna Sabalenka:  World No. 1 Aryna Sabalenka was upset by Kazakhstan's Elena Rybakina 7-5, 6-2 in the quarterfinals of the China Open here.

The top-seeded Belarusian was haunted by service problems throughout the match, committing eight double faults against Rybakina's one, and was broken four times by the fifth seed, reports Xinhua.

Rybakina fired 12 aces while Sabalenka only managed four.