Andrea Leand of Brooklandville, Md., Friday's upset winner over No. 2 seed Andrea Jaeger, proved to herself and the skeptics today that her second-round victory was no fluke.

Playing before a capacity crowd on Court 3, Leand served and volleyed with authority as she defeated Julie Harrington, 6-4, 6-3, to advance to the round of 16 in this, the first pro tournament in which she has played in the main draw instead of the junior bracket.

"I felt a lot more pressure on me today because the match with Andrea, was sort of a fluke," Leand said. "I wanted to prove to myself that I could deal with that and still play well. I just tried to keep hitting forcefully and move the ball around all day."

Leand, who will start her freshman year at Princeton next week, was never in serious trouble and will now face Jo Durie of Britain for a spot in the quarterfinals. Durie eliminated 16-year-old Kathleen Horvath today, 6-4, 3-6, 6-4.

Leand, 17, has quickly become a favorite here. The crowd was clearly on her side from the beginning today.

"I really appreciate the way everyone has been," Leand said. "I've gotten an awful lot of phone calls since Friday and the crowd today was really great."

Leand said she will probably withdraw from the junior tournament beginning Monday since she is still in the main draw. She had come here hoping to win one match in the main draw and then concentrate on the juniors. Now, she is on the verge of becoming a Cinderella story.