Aryna Sabalenka was swatted aside in straight sets by 34th-ranked Nikola Bartunkova in the third round of the China Open on Sunday, leaving the event without its top two seeds. Czech player Bartunkova, 20, sent down four aces to beat the former world number one 6-4, 6-3 in one hour and 35 minutes. “I focused on myself, to be calm, ” Bartunkova said.
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