NYP98090407-04 SEPTEMBER 1998- FLUSHING MEADOWS, NEW YORK, USA: Steffi Graf (Ger)returns serve from Mirjana Lucic (Cro)during September 4th match at the 1998 U.S. Open in Flushing Meadows,New York. Graf won 6-1,6-1. UPI ep/rw/John Angelillo