Caroline Wozniacki complained of dizzy spells on Tuesday as she joined Victoria Azarenka on the long list of casualties at the Wuhan Open, which has been badly hit by upsets and retirements. A day after Maria Sharapova and Eugenie Bouchard both withdrew with injuries, Wozniacki, Azarenka and Belinda Bencic all had medical problems as the end of a long season nears. Wozniacki, the former world number one from Denmark, called the doctor on court to take her temperature as she lost to Anna Karolina Schmiedlova 1-6, 6-4, 7-6 (8/6) in round two.