China Open: Aryna Sabalenka stunned by Nikola Bartunkova in Beijing

World number two Aryna Sabalenka followed Elena Rybakina out the door at the China Open as she fell to a surprise defeat by 34th-ranked Nikola Bartunkova. It comes a day…

Berlin Open: Aryna Sabalenka battles past Nikola Bartunkova, Jessica Pegula through

Bartunkova has had a breakthrough year, beating then world number 10 Belinda Bencic at the Australian Open and finishing runner-up at the grass court event in Birmingham earlier in June.…