Eleni Rossides, 15, of Washington, the youngest of the 90 players at the Crystal City Racquet and Health Club, defeated Jamie Lee Pisarcik, 6-1, 6-3, in a first-round match yesterday in the USTA National Amateur Indoor Championships.

Rossides, a sophomore at Sidwell Friends who is seeded No. 8 in the tournament, used powerful ground strokes and a good serve to overcome Pisarcik. "I move well," Rossides said.

Rossides was ranked 15th nationally last year in the 14-and-under class and is No. 1 in the Middle Atlantic Region. She may get a chance to compete in January's Virginia Slims tournament at the Smith Center as a local wild card.

After playing in tournaments across the country the last couple of summers, Rossides already is a veteran, although she's closer in age to the ball girls than to her opponents.

"I'm used to that," she said, "But I don't play in that many tournaments (in the winter) because my school-work comes first."

Experience proved an edge for defending champion Kathleen Cummings, 21, who beat McLean's Missy Reed, 6-2, 6-1. Cummings, an NCAA all-America, is ranked 84th in the world.

In the men's second round, top-seeded Stevenson Clarke of Washington, who attends Louisiana State, defeated Richmond's Mike Gustafson 6-2, 6-4, and third-seeded Josh Sarner beat Earl Grainger, 2-6, 6-4, 6-2. Fifteenth-seeded Zoran Petkovic was extended to a third-set tie breaker by George Mason's No. 1 player Tim Keegan before prevailing, 6-4, 3-6, 7-6.

Thirteenth-seeded Jeremy Semple of Washington got past Lange Johnson of Washington, 6-3, 6-4.

Clarke's next opponent will be John Zahurak, who scored one of the day's upsets by beating 11th-seeded Rob Loud, 6-4, 1-6, 6-0.