SYDNEY (AP) Top-ranked Caroline Wozniacki of Denmark was upset by Slovakian Dominika Cibulkova 6-3, 6-3 in her opening-round match at the Sydney International on Tuesday.
The defeat follows two straight-sets losses by Wozniacki to world No. 2 Vera Zvonareva and U.S. Open champion Kim Clijsters in exhibition events last week.
Cibulkova, ranked 32nd, converted four of six break opportunities, while Wozniacki only broke her opponent once.