Federer said the upper leg injury that troubled him throughout much of the Australian Open — requiring treatment on and off the court — remains a concern. “I’m still not back in practice at 100 percent,” he said, adding, “I have to be careful.” 费德勒说,他在澳网期间的腿部上侧的伤,虽然经历了在场上场下的治疗,仍然困扰着他“我的训练都还没法回到百分之百的投入。”他补充“我必须要小心。” https://www.nytimes.com/2017/02/21/sports/tennis/roger-federer-retirement-laver-cup.html