NYP99090199 - 01 SEPTEMBER 1999 - NEW YORK, NEW YORK, USA: Martina Hingis (Sweden) returns serve to Sarah Pitkowski (France) during their September 1 match at the 1999 U. S. Open in Flushing Meadows, New York. Hingis defeated Pitkowski 6-1, 6-1. jr/ep/John Angelillo UPI