Martina Hingis, serving up a WTT ‘W.’ (TSF image) Hingis, circa 1997: There was a point tonight when I sat in the bleachers at the Sportimes’ World Team Tennis match on Randall’s Island just outside of Manhattan and thought: Oops, Martina Hingis really has lost it. That was in the middle of Hingis and partner Travis Parrott‘s […]