Radwanska wins 6th in row to advance in Sydney
Two-time Grand Slam champion Svetlana Kuznetsova, who had to qualify, beat former No. 1 Caroline Wozniacki 7-6 (4), 1-6, 6-2, while American qualifier Madison Keys defeated Zheng Jie of China 6-0, 6-4.
In first-round men's play, sixth-seeded Radek Stepanek of Czech Republic defeated Guillermo Garcia-Lopez of Spain 6-2, 6-3, and Spain's Feliciano Lopez beat seventh-seeded Jeremy Chardy of France 6-7 (2), 7-5, 6-3.
Jarkko Nieminen of Finland beat qualifier Bjorn Phau of Germany 6-0, 6-1, and Australian wild-card entry John Millman beat Spain's Tommy Robredo 6-3, 6-4.
Top-seeded John Isner, who received a first-round bye, will play his second-round match against fellow American and qualifier Ryan Harrison. Harrison was leading Roberto Bautista Agut 2-1 in the opening set Tuesday when the Spaniard pulled out with a lower abdominal strain.
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