No. 7 seed Monica Seles defeated 18-year-old qualifier Eleni Daniilidou of Greece in Louis Armstrong Stadium in their third-round match Friday. Seles, 27, who has not captured a Grand Slam title since 1996, has been on a roll in the 2001 US Open, finishing Daniilidou and her two previous opponents off in less than an hour. The 1991 and 1992 US Open champion, Seles has not lost a set thus far in the tournament. She will play the winner of the match between Meghann Shaughnessy and Daja Bedanova in the fourth round.