MASON, Ohio (AP) -- Former U.S. Open champion Sam Stosur moved into the second round of the Western & Southern Open with a 6-1, 7-5 win over Svetlana Kuznetsova on Monday.
Stosur, who won the 2011 U.S. Open, lost in the round of 16 at the Rogers Cup in Toronto last week. She won the Southern California Open the previous week.
In other first-round women's matches, wild card Lauren Davis upset No. 34 Klara Zakopalova, 7-6 (3), 7-6 (1), while 25th-ranked Simona Halep rallied to defeat Su-Wei Hsieh 6-7 (5), 6-1, 6-2.
In early first-round men's action, 26th-ranked Philipp Kohlschreiber of Germany beat American Mardy Fish 7-5, 6-2.