John Isner's stay in Australia has been cut short by injury for the second year in a row. The 13th-seeded American retired with a nagging right ankle injury during his first-round match at the Australian Open on Tuesday after losing the first two sets to Slovakia's Martin Klizan 6-2, 7-6 (6). Last year, Isner was forced to withdraw before the Australian Open even began with bone bruising in his right knee. ''I know movement is not the best part of my game,'' the 2.08-meter (6-foot-10) Isner said, ''but at a certain point I've got to be able to move without pain and I wasn't able to do that today.'' Isner was the only American man seeded at this year's Australian Open. More...