World number one Dinara Safina and most of the top women’s seeds at the U.S. Open coasted through to the second round, but Ana Ivanovic was knocked out by Ukraine’s Kateryna Bondarenko in a playoff thriller that was decided by the last point. Safina, who crashed out of the second round of the Rogers Cup in Canada in late August, survived a scare from Australian teen Olivia Rogowska, winning 6-7 (5-7), 6-2, 6-4.