WASHINGTON, (Pakistan Point News - APP - 21st july,2016) - Former world number one Caroline Wozniacki suffered another setback in season of struggles Wednesday, retiring from a match she led against Australian top seed Samantha Stosur with a left arm injury. The 26-year-old Dane, who was 5-4 since returning from a right ankle injury that wiped out her claycourt campaign, quit when the pain became too unbearable while leading 7-5, 3-4 in the second round of the WTA and ATP Washington Open. "It's one thing after another," Wozniacki said. "After going out in the first round at Wimbledon I'm hitting the ball better and things are going well. "It's really disappointing." Wozniacki said she would need an exam to determine her next move and her status for future events, notably the Rio Olympics, which opens August 5.