Katie Boulter (left) won her first WTA Tour title at the Nottingham Open in June
British number one Katie Boulter suffered a straight-set defeat by top-ranked Aryna Sabalenka in the second round at the China Open.
Boulter was beaten 7-5 7-6 (7-2) by Australian Open champion Sabalenka.
That was despite Boulter, 27, serving for both sets when leading 5-4.
Sabalenka, runner-up at the US Open in September, fought back to take the first set before the Belarusian sealed victory by winning six successive points in a dominant tie-break display.
World number one Sabalenka will face Italy’s Jasmine Paolini for a place in the quarter-finals.
American world number three Coco Gauff and compatriot Jessica Pegula both also progressed in Beijing.
US Open champion Gauff, 19, prevailed in a third set tie-break against Croatia’s Petra Martic, clinching her first match point to seal a 7-5 5-7 7-6 (7-2) victory.
Fourth seed Pegula came back to defeat Russian Anna Blinkova 6-7 (2-7) 6-2 6-1 and set up a meeting with Latvia’s Jelena Ostapenko.
However, Wimbledon runner-up Ons Jabeur was knocked out by Ukrainian 21-year-old Marta Kostyuk.
Tunisian seventh seed Jabeur was broken when serving for the first set at 5-4 and, after falling short in the tie-break, managed to win only one more game as Kostyuk, ranked 33, wrapped up a 7-6 (7-5) 6-1 victory by winning the final five games.
The Women’s Tennis Association decided to resume tournaments in China this year after accepting an investigation will not be carried out by the Chinese government into sexual assault allegations made by former player Peng Shuai.
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