Former No. 1 Caroline Wozniacki advanced to the Kremlin Cup semifinals by beating defending champion Dominika Cibulkova 6-2, 6-7 (1), 6-1 on Friday.
Wozniacki won four consecutive games in the first set and later took advantage of an ailing Cibulkova, who was playing with her right hip bandaged and took a medical timeout while trailing 2-1 in the third set.
The third-seeded Wozniacki struggled with her serve in the second set as both players traded breaks four times. The Dane was serving for the match two times later in the set but was broken at love on both occasions. Cibulkova had her left ankle treated.
''It was a very good match today as both of us played very well,'' Wozniacki said. ''The difference at the end was that I just could keep my highest level up to the end and I managed to win most of the important points especially at the beginning of the third set.''
The 11th-ranked Wozniacki, who finished the last two seasons at No. 1 on the WTA...